(AP Photo/Jason Redmond)
Some airline passengers traveling Saturday felt the consequences of the frightening attack. They were told that new U.S. regulations prevented them from leaving their seats beginning an hour before landing.
The Justice Department charged that Umar Farouk Abdulmutallab had a device containing a high explosive attached to his body. An affidavit with the indictment said that as Northwest Flight 253 descended toward Detroit Metropolitan Airport, Abdulmutallab set off the device -- sparking a fire instead of an explosion.
According to the affidavit filed in U.S. District Court in Detroit, a preliminary analysis of the device showed it contained PETN, also known as pentaerythritol.
The government alleged that Abdulmutallab told passengers that his stomach was upset, then pulled a blanket over himself. Passengers then heard popping noises.
(AP Photo/The Canadian Press, Peter McCabe)
President Barack Obama, on vacation in Hawaii, was briefed about developments in the attack. National Security Council chief of staff Denis McDonough was holed up in a secure hotel room in Hawaii to receive briefings, and other traveling presidential aides were kept shut away to monitor new information.
Abdulmutallab appeared on the Terrorist Identities Datamart Environment database maintained by the U.S. National Counterterrorism Center, said a U.S. official who received a briefing. Containing some 550,000 names, the database includes people with known or suspected ties to a terrorist organization. However, it is not a list that would prohibit a person from boarding a U.S.-bound airplane.
Rep. Peter King, R-N.Y., ranking Republican on the House Homeland Security Committee, said Abdulmutallab was not on the no-fly list.
In Nigeria, Alhaji Umaru Mutallab, Abdulmutallab's father, said, "I believe he might have been to Yemen, but we are investigating to determine that."
The father was chairman of First Bank of Nigeria from 1999 through this month. The banker said his son is a former university student in London but had left Britain to travel abroad.
London's Metropolitan Police also were working with U.S. officials, said a spokeswoman who spoke on condition of anonymity because of department policy.
A search was conducted Saturday at an apartment building in a posh West London neighborhood where the suspect is said to have lived.
University College London issued a statement saying a student named Umar Farouk Abdulmutallab studied mechanical engineering there between September 2005 and June 2008. But the college said it wasn't certain the student was the same person who was on the plane.