US President Barack Obama has said that the "thoughts and prayers of the American people" are with the people of Belgium after a series of fatal terrorist bomb attacks in the capital, Brussels. Dozens have been left dead after a number of explosions at the Maalbeek Metro station and Brussels airport in Zaventem.
Mr Obama, speaking in Havana, said: "The thoughts and prayers of the American people are with the people of Belgium. We stand in solidarity with them in condemning these outrageous attacks against innocent people. We will do whatever is necessary to support our friend and ally Belgium in bringing to justice those who are responsible and this is yet another reminder that the world must unite, we must be together regardless of nationality or race or faith, in fighting against the scourge of terrorism.
"We can and we will defeat those who threaten the safety and security of people all around the world".
The US president joins other major world leaders, including UK Prime Minister David Cameron, in condemning the attacks, and offering support to Belgium. Authorities have now implemented a disaster plan in the capital.
All transport in and out of Brussels airport has been suspended and Eurostar rail links have been cancelled. Keep up with all the latest from Brussels here.