French president Francois Hollande gives press conference on Brussels attacks: "We are facing a global threat which requires a global response"
French president Francois Hollande: "This war (against terrorism) will be a long one."
Chaos in Belgian capital following blasts: phone lines saturated. People encouraged to use Facebook safety check active to let family and friends know they are safe.
US Republican presidential hopeful John Kasich:
The Belgian justice has asked the press not to communicate on the investigation in progess
Syrian government condemns Brussels attacks, says they are "result of wrong policies" on terrorism - State news agency
Belgian public broadcaster VRT has raised the death toll to 34, with 20 people killed in the blast on a metro train and 14 in explosions at the airport.
Tunisia has extended its state of emergency by an extra three months (source: presidency)
Police have found a Kalashnikov assault rifle next to a dead attacker at Brussels airport, according to VRT television.
The nuclear plant of Tihange some 70 kilometres from Brussels has been evacuated.