Missing AirAsia Flight QZ8501 carrying 162 people—including 155 passengers, two pilots, one engineer and four cabin crew—to Singapore from Surabaya, Indonesia, is thought to have crashed into the sea, a senior Indonesian rescue agency official told reporters on Monday.
"Our evaluation of the coordinates that we have received suggested that it is under water, so our presumption now is that the aircraft is under the sea," Bambang Soelistyo, head of Indonesia's search and rescue agency, said at a press conference Monday.
The Indonesian government formally asked the U.S. to assist in the search for the flight on Monday, a senior U.S. official told NBC News. U.S. officials are still trying to determine if they can help.
Search and rescue operations resumed at 6 a.m. local time on Monday morning (6 p.m. ET Sunday), after being suspended overnight due to darkness.
Search efforts have so far yielded nothing concrete, however the Indonesian Air Force said that "something" has been spotted in the waters within the search area, according to Dow Jones.
Indonesian Vice President Jusuf Kalla said on local TV that he could not confirm whether the debris spotted was from the missing jet, according to the news agency. He also said that the search was proving difficult given the bad weather.
Indonesian officials have also said that no signals have been detected from the plane's emergency locator transmitters (ETLs), according Dow Jones. Search efforts are being focused on areas northeast of Indonesia's Bangka-Belitung Islands, which are located between Singapore and Surabaya in the Java Sea. The sea depth around the islands is said to be 25 to 50 meters deep, according to Reuters.
Dow Jones reported late Monday that a greater area would be searched on Tuesday, including the areas south of Bangka Island and the western part of Borneo.
Search operations are being led by Indonesia with Singapore, Malaysia and Australia aiding in the efforts.
Twelve navy ships, five planes, three helicopters and a number of warships are taking part, along with assets from the three neighboring countries, First Admiral Sigit Setiayana, the Naval Aviation Center commander at the Surabaya air force base told the Associated Press. Kalla said that local fisherman are being asked to participate in the search.