This was CNBC's live blog tracking developments on the Israel-Hamas conflict on Oct. 10. See here for the latest updates.
The Israeli Defense Force said the first plane carrying U.S. armaments has arrived in southern Israel. "Our common enemies know that the cooperation between our militaries is stronger than ever, " the IDF said.
The al-Qassam armed wing of Palestinian militant group Hamas said it launched hundreds of missiles at the southern Israeli city of Ashkelon, saying the attack was "in response to the displacement of civilians."
It came shortly after the 5 p.m. local time deadline Hamas had given Ashkelon residents to leave the premises had passed.
On Tuesday, Israel's military said it had regained control of the Gaza-Israel border after Hamas launched a surprise attack on southern Israel unprecedented in scope and deadliness.
Israel continues its airstrikes all over the enclosed territory of Gaza, and has ordered the complete cutting of water, electricity and food to the already impoverished and blockaded population of roughly 2.3 million people.
Hamas, which governs the Gaza Strip, said it has some 150 Israeli hostages in captivity. The U.S. and other governments are working to determine the number of foreign hostages in Hamas' captivity.
The death toll from the ongoing violence between Israel and Hamas has passed 1,800, with more than 1,000 people killed and 2,700 injured in Israel and at least 900 people killed and 4,500 injured in Gaza, according to Palestinian and Israeli health services.
Editor's note: There are discrepancies on the number of people killed and injured between various official outlets on both sides.
Any call to sanction Qatar because of its links to Hamas "simply misunderstands and misconstrues" the nature of their relationship, according to a former U.S. ambassador to Yemen.
"Qatar does not operate in Gaza without an Israeli green light, and so for people to turn around and say well, the Qataris deserve sanctions because of the relationship with Hamas, it simply misunderstands and misconstrues the nature of their relationship," Gerald M. Feierstein, Washington-based Middle East Institute's director for Arabian Peninsula Affairs, told CNBC Street Signs Asia.
"They have long maintained a close relationship with Hamas and have invested in Gaza," he added. "They have been providing various kinds of project support and other kinds of support to Gaza for many years — all of it done with the full knowledge and acquiescence of the government of Israel."
"Qatar has played an important role — with cooperation with the United States — in promoting security and stability of the region. They have often played a very useful role, as we're talking it right here, in terms of mediating," said the retired diplomat, who was the U.S. ambassador to Yemen between 2010 and 2013 under the Obama administration.
"The fact that they maintain these kind of relationships with parties on all sides of the issue, is what enables them to actually be helpful and useful in these kinds of very complicated situations," he added.
Qatar's foreign ministry told Reuters Oct. 9 the Gulf state is involved in mediation talks with Hamas and Israeli officials, including over a possible prisoner swap.
Feierstein said the idea of a ground invasion would be "extremely difficult" for the Israeli army because the Gaza Strip is one of the most densely populated places in the world.
"A negotiated solution would be preferable, but ... it would be complicated or it would probably take a while. If there's a negotiated end to this conflict, the Israelis would need to accept something considerably below that target."
— Clement Tan
Hamas has condemned Biden's comments calling the militant group's attacks on Israel were "sheer evil."
The group accused Biden of "double standards" for excusing Israel's occupation and regular raids on one of Islam's most sacred sites at Al-Aqsa Mosque in East Jerusalem on the West Bank.
After avoiding military operations against Israel since 2021, Hamas on Saturday infiltrated the Jewish state after launching a surprise assault by air, sea and land on parts of southern Israel that border the Gaza Strip.
The dawn attacks — which occurred over the Jewish holiday of Simchat Torah and came 50 years after the outbreak of the 1973 Arab-Israeli war — killed hundreds and wounded thousands in Israel. It spurred retaliatory strikes from Israel that have killed hundreds of civilians in the Gaza Strip so far.
— Clement Tan
Correction: This post has been updated to reflect that Hamas attacked Israel on Saturday. An earlier version misstated the day.
The first plane carrying U.S. ammunition and military supplies has landed at an air base in southern Israel, the Israeli Defense Force said.
The weapons are aimed at facilitating Israel's military operations and boosting its preparedness as the nation defends itself against Hamas militants that infiltrated Israel on Saturday.
"We are grateful for the U.S. backing and assistance to the IDF," the force said. "Our common enemies know that the cooperation between our militaries is stronger than ever, and is a key part in ensuring regional security and stability."
U.S. President Joe Biden has pledged to provide "surging additional military assistance, including ammunition, and interceptors to replenish Iron Dome" to the Jewish state.
"We are going to make sure that Israel does not run out of these critical assets to defend its cities and its citizens," Biden said.
— Joanna Tan
President Joe Biden posted a photo of a phone call with Israel's Prime Minister Benjamin Netanyahu on Tuesday evening.
NBC News reported that Biden urged Netanyahu to minimize civilian casualties in the Gaza Strip.
In a 10-minute televised speech on Tuesday, Biden said he told Netanyahu that, "if the United States experienced what Israel is experiencing, our response would be swift, decisive, and overwhelming."
He added, "We also discussed how democracies like Israel and the United States are stronger and more secure when we act according to the rule of law. Terrorists purposefully target civilians, kill them. We uphold the laws of war - the law of war. It matters."
— Riya Bhattacharjee
— Scott Mlyn
Several reports say that Israeli and Jewish schools in the U.S. are urging parents to tell their kids to delete social media apps such as Instagram, TikTok, and X, formerly known as Twitter. Their concern is that Hamas may use social media to broadcast disturbing images, such as hostages begging for their lives.
A Tel Aviv school's parents' association sent a message saying "We cannot allow our kids to watch this stuff. It is also difficult, furthermore — impossible — to contain all this content on social media," according to a CNN report on Tuesday.
The principal of The Frisch School in Paramus, New Jersey, sent an email to parents urging them to tell their kids to delete Instagram and TikTok "immediately," reported the Jewish Telegraphic Agency, which added that "It was not clear where the information about forthcoming hostage videos was coming from."
Aviva Klompas, a co-founder of the Boundless Israel non-profit, shared via an X post one school's message to parents, which said that "It has been brought to our attention that videos of hostages begging for their lives will soon be released."
"Please remove the @TikTok and @instagram apps from your children's mobile phones," the message said.
— Jonathan Vanian
— Scott Mlyn
Thierry Breton, the European commissioner for the internal market, said in a letter addressed to Musk on Tuesday that his office has "indications" that groups are spreading misinformation and "violent and terrorist" content on X, formerly known as Twitter, and urged the billionaire to respond within a 24-hour period.
The letter comes after numerous researchers, news organizations and other groups have documented a rise of misleading, false and questionable content on X, creating confusion about the current conflict.
Failure to comply with the European regulations around illegal content, referred to as the Digital Services Act, could result in fines worth 6% of a company's annual revenue.
Read the full story here.
— Jonathan Vanian
National Security Advisor Jake Sullivan told reporters Tuesday that Iran is "complicit" in Hamas' attack on Israel but there is no evidence linking Tehran to the violence over the weekend.
"We've said since the beginning that Iran is complicit in a broad sense because they have provided the lion's share of the funding for the military wing of Hamas, they've provided training, they have provided capabilities, they have provided support and they've had engagement and contact with Hamas over years and years, and all of that has played a role in contributing to what we have seen," Sullivan said.
"Now, as to the question of whether Iran knew about this attack in advance or helped plan or direct this attack, we do not, as of the moment I'm standing here at the podium, have confirmation of that."
— Emma Kinery
President Joe Biden has stressed the importance of upholding the laws of war as Israel responds with overwhelming force to Hamas' devastating terrorist attack that targeted hundreds of civilians.
Biden said he told Israeli Prime Minister Benjamin Netanyahu the U.S. response would be swift, decisive and overwhelming if the American people faced terrorism of the kind Israel has suffered in recent days.
The president described Hamas' intentional targeting of civilians as "pure, unadulterated evil."
But Biden said democracies are stronger and more secure when they act according to the rule of law.
"Terrorists purposely target civilians, kill them. We uphold the laws of war. It matters — there's a difference," Biden said in a televised address.
More than 1,000 Israelis have died in the attack Hamas launched on towns that border the Gaza Strip. At least 830 Palestinians have been killed by Israel's retaliatory strikes.
Israel on Monday ordered a "complete siege" of Gaza that would cut off electricity, food and fuel to the densely populated, impoverished enclave.
— Spencer Kimball
National Security Advisor Jake Sullivan told reporters Tuesday it is his understanding that Israel does not plan to launch a total siege on Gaza, but Biden and Netanyahu discussed how to distinguish terrorists from civilians.
"We are consulting with the Israeli government about their actions in this regard," Sullivan said.
"President Biden and Prime Minister Netanyahu had the opportunity to talk through the difference between going full bore against Hamas terrorists and how we distinguish between terrorists and innocent civilians."
— Emma Kinery
U.S. Secretary of State Antony Blinken will travel to Israel tomorrow on the heels of unprecedented Hamas terrorist attacks on Israel.
State Department spokesperson Matt Miller announced Blinken's travel during a daily press briefing.
— Amanda Macias
American Airlines says it will suspend its flights to Tel Aviv until at least Dec. 5, the latest airline to alert customers about a lengthy service disruption in the wake of the Hamas attacks and Israeli retaliation.
American Airlines had been offering flights from New York's John F. Kennedy International Airport until this weekend when the carrier and other U.S. airlines halted service following the attacks.
Delta Air Lines on Monday said its Israeli nonstops from the U.S. won't operate until at least Nov. 1. United Airlines, which had been flying to Tel Aviv more than any other airline, has suspended its service indefinitely.
— Leslie Josephs
Ben Salisbury, director of research and senior policy analyst at Height Capital Markets, joins "Squawk on the Street" to discuss the important elements to consider regarding oil price action as the Israel-Hamas conflict rages on, Iran's centrality to the global oil market and how Saudi Arabia plays into the fold.
— Anuz Thapa
President Joe Biden said the White House will ask Congress to take "urgent action" to fund the national security requirements of U.S. allies in the wake of the devastating attack by Hamas on Israel.
Biden said his administration has worked closely with Congress throughout the crisis in Israel and Gaza.
"This is not about party or politics. It's about the security of our world — the security of the United States of America," the president said.
Congress faces paralysis right now as the House of Representatives remains leaderless a week after a faction of hard-right Republicans deposed Kevin McCarthy in a no-confidence vote.
There is little Congress can do until a new speaker is elected. House Republicans will vote Wednesday to select a nominee for the post, who will then face a full vote on the House floor.
It is unclear if the top candidates, House Majority Leader Steve Scalise and Judiciary Committee Chair Jim Jordan, can secure the 217 votes required to become speaker.
— Spencer Kimball
President Joe Biden confirmed in a speech Tuesday afternoon at least 14 Americans have been killed in Israel.
Biden confirmed for the first time that Americans are among the people being held hostage by Hamas.
National Security Advisor Jake Sullivan told reporters after Biden's speech that the government believes there are around 20 or more Americans missing but noted that it didn't mean all 20 were taken hostage.
"We do not know the number of hostages we have at this time," Sullivan said.
— Emma Kinery
Some travel-related stocks bounced back Tuesday after selling off during the previous session amid a spike in oil prices and as the conflict unfolded between Israel and the designated terrorist group Hamas.
Shares of United Airlines, Delta Air Lines and American Airlines gained at least 3%. The stocks sold off by more than 4% each during Monday's session amid a slew of flight cancelations coming in and out of the country. JetBlue Airways popped 3.6%, while Southwest Airlines added more than 2%.
Cruise stocks Carnival and Royal Caribbean rose 3.1% and 2.7%, respectively. Hotel stocks Marriott and Hilton gained about 3% each.
— Samantha Subin
Read more about the war's effect on the financial markets at CNBC's live market blog.
Goldman Sachs' chief U.S. equity strategist David Kostin does not expect the Israel-Hamas conflict will have a huge effect on markets.
"It's a tragedy from a human point of view," Kostin told CNBC's "Squawk on the Street" on Tuesday. "But the idea fundamentally, we'll be getting earnings for the last three months, which is obviously backward looking. And the prospects looking forward are probably more domestically facing issues that are sort of pertinent to a lot of portfolio managers."
"So less likely to have a big impact on a sustainable basis," Kostin said.
Still, the strategist expects other risk factors will continue to weigh on stocks, citing higher yields and oil prices that could impede multiple expansion. He expects the S&P 500 will end 2023 around the 4,300 level, which is a little lower than where the broader index was last trading at about 4,380. He added cash is attractive.
However, he does not anticipate a recession on the horizon.
— Sarah Min
Read more about the war's effect on the financial markets at CNBC's live market blog.
A spokesperson for the Israeli Embassy in Washington, D.C., confirmed to NBC News that the death toll in Israel due to the conflict with Hamas has passed 1,000 people.
The conflict was triggered by a surprise air, land and sea attack by Hamas militants in Israel on Saturday.
— Amanda Macias
Israeli lawmakers said they would debate later this week about state guarantees for war risk insurance for the country's airlines, Reuters reported.
To continue flying at a time when many carriers have pulled out of the country, the government asked the parliamentary finance committee for a $5 billion guarantee to cover war risk policies.
Reuters also reported that Turkish Airlines became the latest foreign carrier to suspend service to and from Israel.
— Leslie Josephs