Brussels' stations will open at 16h, security is enhanced.
An Iraqi intelligence official says sources in the Syrian city of Raqqa have told them that the Islamic State group has been planning terrorist attacks in Europe for two months which would "target airports and train stations."
The official tells The Associated Press on Tuesday that Iraqi officials told European countries about the plans "but Brussels was not part of the plans" at the time.
He says ISIS militants changed the operation and moved it to Brussels "because of the detention of Salah Abdeslam" - the Paris attacks suspect arrested Friday in Brussels.
Another senior Iraqi intelligence official said "ISIS was behind this operation and it was planned in Raqqa two months ago and there are three suicide attackers who will carry out another attack."
The officials spoke on condition of anonymity since the investigation was ongoing.
(From AP reporter Qassim Abdul-Zahra in Baghdad)
Florence Muls, a spokeswoman for the Brussels Airport, says a third bomb has been neutralized at the airport after two other bombs killed at least 10 people there Tuesday morning.
Muls told The Associated Press the third bomb was dispensed of "with a controlled action" once the chaos of the first explosives had eased somewhat.