Photo detail
FILE - This photo posted on a file sharing website Wednesday, Jan. 11, 2017, by the Islamic State Group in Sinai, a militant organization, shows a deadly attack by militants on an Egyptian police checkpoint, in el-Arish, north Sinai, Egypt. The Egypt mosque massacre could point to the rise of an ultra-extremist faction that is so radical in its readiness to kill fellow Muslims that it has caused rifts within the Islamic State group _ already notorious for its atrocities. (Islamic State Group in Sinai via AP, File )