German police arrested a man on suspicion of being a member of ISIS, and of feeding information to Abdelhamid Abaaoud, who planned last year's Paris attack.
The 20-year old Algerian, Bilal C., was tasked by Abaaoud to check border controls, waiting times, and entry and exit points along the 'Balkan route' last year.
Bilal C. was already in custody, "on another matter," when the German domestic intelligence service identified him as an IS suspect, said federal prosecutors in a statement. A judge had issued a new arrest warrant.