Second Nigerian arrested aboard US flight

A second Nigerian man was arrested aboard an airliner in Detroit on Sunday, after he locked himself in the airliner's restroom for about an hour. The FBI investigated the incident but has given it the "all clear".

Here is the plane, Northwest Airlines Flight 253 from Amsterdam.

Flight crew on board became concerned after the passenger said he was sick. He spent about an hour locked in the restroom and refused to come out even when ordered by the flight crew.

The pilot then requested emergency assistance upon arrival, sending federal authorities scrambling to respond.

Passengers recalled the scene.

Northwest Airlines flight 253 sits on the tarmac after requesting emergency help at Detroit Metropolitan Airport in Romulus, Mich., Sunday, Dec. 27, 2009.(AP Photo/Carlos Osorio)