One of them, Faycal Cheffou, is accused of being involved in a terrorist group, terrorist murder and attempted terrorist murder.
Two other suspects identified as Rabah N and Aboubakar A have been charged with involvement in the activities of a terrorist group.
The attacks in the Belgian capital killed 31 people and injured another 270.
Cheffou, a freelance journalist and film-maker, is the suspected fugitive pictured in a light-coloured jacket and hat walking through Brussels Airport.
It’s alleged he fled the scene after his two accomplices blew themselves up.
A fourth man, taken into custody on Friday after he was shot by police at a Brussels tram stop, is still being quizzed by police.
Authorities believe both the Brussels attacks and the November 13 bombings in Paris that killed 130 people were plotted from Belgium.
Heavily armed police swept into the city’s suburb on Friday in operations linked to the attacks.
Signs of a large police operation remained visible yesterday with one man shot in the Schaerbeek district.
The man, who was sitting with a young girl and holding a bag, was ordered by police “to put the bag far from him”.
After he did so, police shot him twice.
It also emerged yesterday that a woman killed in the bombing had warned four months earlier that demonising Muslims would help drive the recruitment of extremists.
Sascha Pinczowski posted on Facebook after the November Paris attacks that “ignorant spreading of anti-Muslim sentiment and propaganda does nothing but benefit ISIS”.
Ms Pinczowski, 26, and her brother, Alexander, were among those killed in Brussels.
Meanwhile, organisers postponed a planned march for solidarity in Brussels today after an appeal from the country’s interior minister.
Jan Jambon urged residents not to rally in solidarity for the victims of Tuesday’s attacks, saying police are too stretched with their investigations.
Event organiser Emmanuel Foulon said the event would be held later.
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