There have been two loud explosions at a Brussels airport which is being evacuated amid reports of a fatality and several casualties.
Video and images on social media showed smoke rising from an airport building, shattered windows and confused and shocked passengers fleeing the terminal to safety ushered by armed police.
Footage also showed ceiling tiles littered across the floor and strewn black luggage belts, cases and bags at a check-in desk.
According to reports the blasts centred on an American Airlines desk in a departure hall at around 8am.
Several people have been injured and all trains suspended to the airport which has been closed.
Airport spokeswoman Anke Fransen said: "There were two blasts in the departure hall. First aid team are in place for help."
Explosions At Brussels Airport: Live Updates
It comes as the Belgian capital is on high alert following the dramatic arrest of Paris attacks suspect Salah Abdeslam in the city last Friday.
Sky's Alex Rossi, at the scene, said: "I was in the duty free in Zaventem Airport and I heard two very, very loud explosions.
I could feel the building move. There was also dust and smoke as well.
"I went towards where the explosion came from and there were people coming out looking very dazed and shocked.
"The thinking here is that it is some kind of terrorist attack although that hasn't been verified by any of the authorities here at the airport.
"Don't know how the explosion took place, the method if you like. But it certainly seems Brussels airport has been targeted in a terrorist attack.
"We are all being moved out of the airport now towards the emergency exit.
"There is a great deal of confusion here. Certainly there are a number of very upset, as you might imagine, very frightened people."
He added: "There are fears that there might be other attackers."