The so-called Islamic State has claimed responsibility for terror attacks in the Belgian capital which have killed at least 34 people.
Up to 14 died and around 100 were injured in two explosions in the departure hall of Brussels Airport.
Shortly after, an explosion at a metro station near the main EU buildings is thought to have killed at least twenty and injured 106.
Belgium's Prime Minister has warned there could be more attacks.
CCTV has been released of three men at the airport - two of whom are thought to have been suicide bombers, and a third who is reported to be on the run.
Local media has reported that shots were fired and words shouted in Arabic before the blast.
An assault rifle was reportedly found next to a dead attacker.
Speaking in Havana, the US President Barack Obama says the international community must stand united against terrorism:
Once again Europe is under attack. We stand with Belgium. Those using death and violence must and will be defeated.
— Enda Kenny (@EndaKennyTD) March 22, 2016
Acting Taoiseach Enda Kenny says there's are no indication of Irish injuries in the Brussels attacks:
The Belgian Prime Minister, Charles Michel, says they feared a terror attack and it happened.
He says the investigation into who was responsible is continuing.
#BREAKING: Two loud explosions at #Zaventem airport in #Brussels pic.twitter.com/JFw9RGLjnh
— Anna Ahronheim (@AAhronheim) March 22, 2016
Meanwhile, a bomb attack at Maelbeek Metro station in central Brussels has reported claimed at least 20 lives.
The airport and the Metro system have been shut down.
We've enabled free changes / refunds to guests travelling to #Brussels on EI631/638/639 today 22Mar16 and EI630/631/638/639 tomorrow 23Mar16
— Aer Lingus (@AerLingus) March 22, 2016
Travel update: Brussels Zaventem Airport is closed until 6am on Wednesday. Latest flight info: https://t.co/7DhdJFkB9u
— Ryanair (@Ryanair) March 22, 2016
Irish passenger and Erasmus student Luke was waiting at the gate in Brussels airport for a flight to Dublin.
We have increased our security setting for Belgium to exercise extreme caution. Latest updates on our website: https://t.co/FR0Idm86a1
— DFATravel (@dfatravel) March 22, 2016
Europe correspondent with the Irish Times Suzanne Lynch says the country was already braced for an attack:
The scene close to Maelbeek Metro station following the explosion there. 
Our thoughts go to the victims of the horrible events that happened here at #brusselsairport this morning, their family and friends.
— Brussels Airport (@BrusselsAirport) March 22, 2016
