The call came to Philadelphia police at about 7 a.m. local time (1100 GMT) and the plane, Flight 1267, which had taken off for Dallas a short time earlier, was diverted back to the airport, authorities said.
The FBI said authorities were speaking to one person of interest in the incident and that no explosives had been found on the plane.
"The plane is cleared," FBI spokesman J.J. Klaver said.
Live television images showed the plane parked on the runway at Philadelphia's airport, with passengers on a bus being transported away from the aircraft. (Reporting by Dave Warner; Editing by Barbara Goldberg and Will Dunham)
Copyright 2013 mojeNovosti.com
web developer: BTGcms