“[The worshippers] heard heavy gunfire outside the mosque and the sound of explosions followed by the entry of a number of people. Some were masked and others were unmasked with thick, wild hair,” Mr Sadeq said.
“They were carrying machine guns and a flag that reads “There is no God but Allah, Muhammad is the Messenger of Allah” and wearing clothes similar to military uniforms,” he said. He officially raised the death toll from an initial count of 235 to 305.
Most of the men at the mosque were Sufis, adherents to a mystic tradition of Islam. Isil considers Sufis to be heretics and has threatened them often. “Your blood is filthy and permissible to shed,” a Sinai Province leader warned Sufis last year in an interview with the Isil magazine Rumiyah.
Abdel Fattah el-Sisi, Egypt’s president, said a mausoleum would be built to commemorate the victims of the worst terror attack in Egyptian history.
Egypt’s army released footage of what it said were airstrikes against terrorist outposts in Sinai, which destroyed “quantities of weapons, ammunition, explosive materials and administrative facilities”. Witnesses said the strikes targeted mountainous areas around Rawdah.
The military has been battling against a bloody insurgency in the Sinai since 2011 but has so far been unable to defeat the jihadists or prevent a string of high-profile attacks.
Egypt’s government, which relies heavily on tourism, has been at pains to stress that most of the attacks have taken place in a limited area in north Sinai. “Egypt as a State, society and region is still, with its overwhelming majority, far from the hands of bloody terrorist groups,” the government’s information office said in a statement.
The Rafah crossing between Egypt and Gaza had been due to open on Saturday, providing a rare opportunity for the isolated people of Gaza to travel to the outside world. But the crossing remained closed in the wake of the attack and travellers were told to stay at home.