11 people dead and several injured after two explosions In Brussel Airport
Witnesses said they 'felt the shockwaves' of the blasts which are believed to have centred on the American Airlines check-in desk at 8am (7am GMT).
There were reports that shouts in Arabic were heard in the building before the two explosion and shots were fired in the aftermath.
Photographs from inside the arrivals hall showed the floor was covered in fallen roof tiles and dust as bloodied people hobbled out of the airport. Others injured were photographed lying on the floor.
Video also shows terrified passengers running for their lives out of the terminal.
In the aftermath of the explosions thousands of people waiting for flights this morning were penned inside the terminal as police sealed off the shattered arrivals hall.
The explosions come just a day after the Belgium Interior Minister warned of possible revenge attacks after the arrest of Paris terror attack suspect Salah Abdeslam in the city last week.
People already checked-in were then slowly evacuated through emergency exits – but were told to leave all their hand luggage as police checked bags for more explosives.
Evacuated air passengers are being ferried onto buses and are being driven to a 'crisis centre' away from the airport.
Women and children are being moved first.
Sky News Middle East correspondent Alex Rossi, who was at the airport en route for Tel Aviv, told the channel: 'I could feel the buildings move.'
Pauline Deglume tweeted: 'My godfather is located at the airport and said he saw dismembered bodies everywhere.'
Armed police in protective clothing combed the building for more wounded travellers and suspicious bags.
All flights are being diverted from the airport this morning as it remains on lockdown.
Flights due to land at Brussels-Zaventem, which handles 21million passengers a year, were sent to Antwerp, Liege, and Brussels Charleroi airports.
The Belgian Interior Minister has raised the country's security level to 'maximum' this morning as it prepares itself for more terror attacks in the wake of the airport bombings.
The incident came as the Belgian capital was on a state of high alert following the arrest of Paris terror attack suspect Salah Abdeslam in the city last week.
Belgium's Interior Minister, Jan Jambon, said the country was on high alert for a possible revenge attack following the capture of 26-year-old Salah Abdeslam in a flat in Brussels on Friday.
'We know that stopping one cell can ... push others into action. We are aware of it in this case,' he told public radio.
Brussels is on high alert following the capture last Friday of Salah Abdeslam, the most-wanted man in Europe, in the Molenbeek neighbourhood of the city after a four-month search.