Egyptian officials say Islamic State militants have killed five Egyptian civilians and dumped their bodies, wearing orange jumpsuits, in a restive corner of the Sinai Peninsula.

They say two of the men were beheaded and the others shot in the head over accusations they had collaborated with the Egyptian army, which is fighting the insurgents in the area around the city of Rafah and the town of Sheikh Zuweid, where the bodies were found. The officials spoke on condition of anonymity because they weren't authorized to release the information to journalists.

The army has been battling militants in the area for years, with hundreds of casualties on both sides. The army often claims it has killed dozens of militants. Journalists are banned from the area.