Two explosions have led to the evacuation of Brussels airport.
Belgian media reported that several people had been injured in the airport's departure hall.
One early, unconfirmed report was that the explosion occurred at an American Airlines check-in desk.
Amateur footage from the airport showed people fleeing from what appeared to have been a large explosion that blew out the glass frontage of a terminal building.
Passengers inside the building were being ushered towards exits.
More to come.