A Ryanair passenger plane landed safely on Friday at the final destination in Oslo after an alarm was raised about a possible explosive on board.
Danish F-16s escorted the plane to the Norwegian capital, where the police were ready.
He says in a statement that a 51-year-old Briton has been arrested who is said to be behind the threat.
The plane had left London and was in the air when the explosive was reported. An airline spokeswoman said crew members found a “note saying that there may have been a safety risk on board.”
The Norwegian authorities say that all passengers could be safely evacuated after landing. Explosives experts will investigate the aircraft.