Updated Nov 24, 2017 9:49 AM EST
EL-ARISH, Egypt — Militants bombed a Sufi mosque and fired on worshippers in the volatile Sinai Peninsula during Friday prayers, killing at least 200 people in what appeared to be the latest attack by the area’s ISIS affiliate, Egyptian state news agency MENA reports.
The extremists attacked the al-Rawdah mosque in the town of Bir al-Abd, 25 miles from the North Sinai provincial capital of el-Arish, opening fire from four off-road vehicles on worshippers inside during the sermon, three police officers said.
Victims were being transferred to local hospitals, they added, speaking on condition of anonymity because they weren’t authorized to brief reporters. They said the ISIS militants had blocked escape routes from the area by blowing up cars and leaving the burning wrecks blocking the roads.
Egypt’s state news agency reported the casualty toll, citing “official sources,” revising it upward several times following the officials’ initial reports. MENA said 130 people were also wounded in the attack.
The attack was the largest single targeting of Egyptian civilians and the first on a large mosque congregation since the ISIS affiliate began its campaign of violence against the state following the military’s 2013 overthrow of an elected but divisive Islamist president.
MENA reported that Egypt’s presidency declared a three-day mourning period for the attack, as President Abdel-Fattah el-Sissi convened a high-level meeting of security officials.
Cairo’s international airport boosted security following the attack, with more troopers and forces seen patrolling passenger halls, conducting searches and manning checkpoints at airport approaches.
Security forces have been battling militants in northern Sinai for years, but attacks to date have focused on military and police assets, although assassinations of individuals ISIS considers government spies or religious heretics are not uncommon.
In September, ISIS militants , killing 18 police and wounding seven others in one of the deadliest attacks this year in the restive region bordering Israel and the Gaza…