Belliraj faces trial on terrorism charges in Morocco and has stated that he carried out six killings in Belgium, Flandersnews.com reported.

It was revealed last week that Belliraj was also a paid informant for the Belgian security services, which apparently was unaware of his other activities while he was living in Belgium.

A contingent of six Belgian federal police officers will prepare for the later arrival of an official Belgian commission who will interrogate Belliraj, Flandersnews.com said.