A bomb has exploded during Friday prayers at a mosque in Egypt's North Sinai province, killing at least 85 and injuring 80.
Three Egyptian security officials told Associated Press that militants are behind the attack. They said extremists opened fire from four off-road vehicles on the al-Rawdah mosque in the town of Bir al-Abd, 40 km (25 miles) from the provincial capital of el-Arish.
At least 85 people have been killed and some 80 have been wounded, a spokesperson for the health ministry told Egyptian TV.
The explosion comes just weeks after a major militant attack against Egyptian Soldiers in the Sinai.
More than 50 soldiers were killed during a shootout with militants on 20 October.
Egypt has been fighting an Islamist insurgency since President Mohammed Morsi was ousted in 2013.
More to follow.
This is a breaking news story and will be updated regularly as new information and developments become available.