A Russian Aeroflot flight SU1515 landed at the airport of Khanty-Mansiysk after a man on board reportedly demanded to divert the plane to Afghanistan, TASS reported on Tuesday.
The Boeing 737, with 75 people on board, was traveling from Surgut to Moscow.
The man, who was mentally unstable with multiple criminal records, has been detained, according to RT.
Police have been dispatched to the scene and there are no reports of casualties so far.