Threat forces passengers off plane at Philadelphia International Airport

SOUTH PHILADELPHIA -- Passengers were forced off an American Airlines flight in Philadelphia Friday morning after a threatening note was found in the plane's bathroom.

Officials say the note mentioned an unspecified threat.

Passengers of Flight 672 were forced off and all bags were re-checked.

Nothing suspicious was found during a search and passengers were later allowed to re-board.

After about an hour delay, the plane was cleared to continue it's scheduled flight to San Francisco.