An explosion has seen the evacuation of Terminal 3 at Beijing International Airport, with a man in a wheelchair reportedly detonating a device.
Photos posted on Weibo show a dark haired man waving a white package above his head before the explosion.
He is said to have been injured in the blast, which filled the terminal with smoke.
Chinese news agency Xinha reported it was a protest against the Chinese authorities, with the man handing out leaflets complaining he had been beaten up by security guards in an earlier incident in southern China.
Later images from the airport showed the wheelchair on its side with officials treating the man on the floor.
Officials said order has been restored at the airport and there is no disruption to flights.