Police issued a photograph on Tuesday evening of a man they are urgently seeking, on suspicion of being involved in the Brussels airport attack.
The screengrab, taken from video surveillance at the airport's departure hall, shows a man in a white jacket, white shirt and dark hat pushing a luggage trolley.
He was filmed alongside two other men wearing black, who are suspected of setting off the explosions in the terminal building.
La Libre Belgique newspaper says the men were wearing a glove on just one hand, which could have been used to hide a detonator.
Belgian federal prosecutor Frederick Van Leeuw confirmed at a press conference on Tuesday evening that it was "likely that two of the three suspects at the airport killed themselves and the third is on the run."
He said it was too early to confirm a link with the Paris attacks - and the Islamic State's claim for responsibility could not yet be verified.
The prosecutor confirmed in a statement on Tuesday evening that an address in the Brussels district of Schaerbeek was raided by police earlier on the day. Police searching the property found a nail bomb and an Islamic State flag.
