A main suspect in the Brussels bombings has also been charged over the Paris attacks four months earlier, Belgian federal prosecutors said.

Swedish national Osama Krayem, 23, who was arrested in Brussels alongside suspect Mohamed Abrini earlier this month, has been charged with terrorist murder and participation in a terror group.

The Brussels bombings claimed the lives of 32 victims in March, while 130 died in November's attacks in Paris.

Krayem might have been present in different safe houses used by the militant attackers, such as a suspected bomb factory raided in December, prosecutors said.

"He has been charged with terrorist murder and participation in the activities of a terrorist group," prosecutors said.