Between 25 and 30 gunmen, traveling in five vehicles and carrying an Islamic State flag, surrounded a Sufi mosque on all sides in Bir al-Abed, a dusty town on a road that arcs across the sandy plain of North Sinai.
After an explosion, they positioned themselves outside the main entrance of the mosque and its 12 windows, spraying the worshipers with gunfire. Seven parked cars were set ablaze to prevent victims from escaping. Among the dead were 27 children.
For Sinai residents, the attack deepened an abiding sense of dread about life in a part of Egypt where many feel trapped between barbarous militants and a heartless military. At a hospital in nearby Ismailia, survivors recounted how they leapt through windows as militants raked them with gunfire, or of watching their friends and relatives die.