Here's how the world's media reacted to the news of the worst London terror attack in more than a decade on Wednesday.
The Islamic State is claiming responsibility for the terror attack in London, according to a report in the news wires.
"There is often a support mechanism, Jack Tomarchio tells CNBC as British authorities continue to investigate Wednesday's terror attack.
CNBC's Willem Marx reports the latest details on the investigation into the deadly attack in London that left four people dead and 40 injured.
Anne-Marie Slaughter, New America CEO, discusses a strategy that fights global threats by looking at the links between groups.
Jack Tomarchio, former DHS official, talks about the deadly attack in London and the difficulty in preventing these attacks in a free society. It's not just an immigrant issue, says Tomarchio.
The U.K. will not waiver under the threat of terrorism, Prime Minister Theresa May has said in an announcement to the House of Commons Thursday.
Leader of the U.K. Labour Party Jeremy Corbyn addresses Parliament, adding that communities are united by the "human impulse of solidarity."
British Prime Minister Theresa May addressing Parliament confirms earlier reports that the attacker was British born but says there is no reason to believe there are further imminent attacks.
U.K. Prime Minister Theresa May adds that the country's security threat level will remain at "severe," meaning that an attack is highly likely.
U.K. Prime Minister Theresa May adds that the policing and security around the Houses of Parliament is being reviewed.
U.K. Prime Minister Theresa May addresses Parliament following Wednesday's terror attack in London.
CNBC's Willem Marx reports the latest details on the investigation into the deadly attack in London.
Governments need to defeat extremist group ISIS and welcome refugees fleeing warzones, billionaire Richard Branson said.
Emily Winterbotham, research fellow at Rusi, discusses Wednesday's terror attack in London.
The House of Commons was locked down after the attack. Officials said Prime Minister Theresa May was safe and at work.
Jonathan Wood, director of global risk analysis at Control Risks, discusses the changing strategy of terror attackers in Europe.
CNBC's Willem Marx reports from the scene of Wednesday's suspected terrorist attack in Westminster, London.
London's Metropolitan Police hold a news conference about Wednesday's terror attack in Westminster.
Willem Marx updates from Westminster on London's suspected terror attack, with comments from London Mayor Sadiq Khan.