An RAF Typhoon fighter was scrambled to escort a passenger plane into Manchester Airport after the crew received a threat about a "device" on board.br br In what turned out to be a suspected hoax, Greater Manchester Police launched a "full emergency" response as officers did not "know how genuine this threat is".br br The plane involved was a Qatar Airways Airbus A330-300 with 282 people on board and the RAF plane was a Typhoon from RAF Coningsby in Lincolnshire.br br Sources said the alert began when cabin crew on the flight from Qatar were passed a note by a passenger. The note was passed to the captain, who alerted air traffic controllers and scrambled the quick reaction alert Typhoon jet.