Two Royal Air Force (RAF) Typhoon jets were scrambled to assist an American Airlines passenger plane shortly before it landed at London's Heathrow airport on Tuesday after a woman attempted to gain access to the flight deck.
The woman, who has yet to be identified, was arrested by London police after the pilot on flight AA078 bound from Dallas-Fort Worth requested urgent assistance.
The plane landed safely at approximately 10:50 a.m. GMT and the arrest was made soon after, a spokesman for the Metropolitan Police said.
Police said the woman did not pose a terror threat to the Boeing 767-300, which had 161 passengers and 12 crew on board.
Richard Hedges, American Airlines director of corporate communications, Europe & Pacific, said: "American Airlines flight 78 from Dallas/Fort Worth to London Heathrow was met on arrival by police following reports of a disruptive passenger on board the aircraft.
"A female passenger had become distressed during the flight and reportedly attempted to gain access to the flight deck.
"The passenger was calmed by flight attendants but as a precaution a priority approach to London was requested and police were requested to meet the aircraft on arrival."