(reuters) -- The suspects are part of a group of men who fled toward Kurdish-held lines when Iraqi forces captured Hawija, the last stronghold of the militants in northern Iraq.

"Approximately 1,000 men surrendered over the last week. Not all, however, are terrorists," said the official, referring to Isis members. "It's fair to say hundreds probably are Isis members, but that will be clear after the debriefs."

(Photo: At the Kurdish screening center in Dibis, suspects are searched, their shoes taken, their pockets emptied and their belts discarded. The New York Times)