Russia carried out its largest air strike on Ukraine's energy system since its invasion in February 2022, damaging power units at a dam and causing blackouts for more than a million people
Police said one raid had taken place in the poor Brussels district of Molenbeek and another in the neighbouring district of Jette, but would not say if any arrests were made.
The government source declined to give further details or comment on a report that the raids were linked to one of the Paris suicide bombers, Belgium-based Bilal Hadfi.