A US Airways flight bound for London returned to Philadelphia due to what the airline called a "disruptive passenger."
The passenger was restrained on board Flight 728 by federal officials Tuesday night, said Michelle Mohr, an airline spokeswoman.
The man was removed when the plane landed in Philadelphia, and the flight departed again for Heathrow about four hours after the normal departure time, Mohr said.
"I certainly think that safety is the number one priority, and whenever an airline uses safety and the safety of the passengers to turn back, I'm all for it," said John Yuchimiuk, of Ruscombmanor Township, Berks County, who was a passenger on another flight.
The airline's statement contained no information about the nature of the alleged disruptive behavior. No one was injured.
Airport police said they were notified about 11:45 p.m. Tuesday about the incident and a man was taken into custody by the FBI.