US Airways plane from Glasgow evacuated at Philadelphia
A flight from Glasgow was evacuated at Philadelphia airport in the United States and searched by explosive experts overnight.
More than 160 passengers and crew members were taken off the US Airways aircraft shortly before it was due to fly on to Alaska.
The Transportation Security Administration said the investigation was because of a threatening note.
A spokeswoman for the airport said nothing amiss was found.
The plane was cleared for the next leg of its journey and passengers bound for Anchorage were allowed to reboard.
Airport spokeswoman Victoria Lupica said the information had been received in Europe and passed to authorities in the US.
No details of the note were given.
She said: "Once we had deplaned the passengers the aircraft was towed to a remote area and checked thoroughly by the Transportation Security Administration and the police.
"All our law enforcement agencies were involved. We take any threat seriously."