At least 235 people were killed and 109 injured Friday when gunmen armed with explosives attacked a Sufi-linked mosque in Egypt’s restive Sinai Peninsula, according to officials quoted by the state media, the deadliest assault in the country’s modern history.

The assailants detonated a bomb at the Al Rawda mosque in the town of Ber al Abd, west of the city of al-Arish, state media said, before opening fire. Several ambulance vehicles were fired upon as they tried to ferry the injured from the scene, state television said.

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