Najim Laachraoui, one of the Brussels airport suicide bombers, has been identified by several Frenchmen held hostage by Islamic State in Syria as one of their prison guards, reports RFI.
Four French journalists kidnapped and held in Syria from 2013 to 2014 had identified a guard known as 'Abou Idriss', sources close to the investigation said on Friday.
One of the journalists, Nicolas Henin, "has formally identified" Abou Idriss as being Najim Laachraoui, his lawyer Marie-Laure Ingouf said, confirming reports in French newspapers.
Belgian prosecutors have said Laachraoui travelled to Syria in February 2013 to join up with IS armed group. There was no further trace of the Belgian national until he was registered under a false name at the border between Austria and Hungary in September 2015.
Laachraoui, 24, was one of the two suicide bombers who struck Brussels airport on 22 March, while a third attacker blew himself up at on a metro train, with the two attacks killing 31 people.