Egypt’s Ministry of Defence released a video on Saturday, November 25 showing the country’s military carrying out air strikes on what they said were militant outposts connected to a deadly mosque attack in North Sinai on Friday, November 24.

At least 305 people including 27 children were killed in the attack, in which a bomb was detonated and militants gunned down fleeing worshippers, state media and witnesses report.

No group immediately claimed responsibility for the assault, but since 2013 Egyptian security forces have battled an Islamic State affiliate in the mainly desert region, and militants have killed hundreds of police and soldiers.

Egypt’s President Abdel Fattah al-Sisi declared three days of mourning in the wake of the attack and vowed to restore stability “with utmost force”.

Militant gunmen who killed more than 300 people in an attack on a mosque in Egypt’s North Sinaion Friday were carrying an Islamic State flag and were between25 to 30 in number, the public prosecutor’s office said in a statement on Saturday.

The gunmen, some wearing masks and military-style uniforms, surrounded the mosque blocking windows and a doorway and opened fire inside with automatic rifles, the statement citing their investigation and interviews with wounded survivors.

“They numbered between 25 and 30, carrying the Daesh flag and took up positions in front of the mosque door and its 12windows with automatic rifles,” the statement said using an Arabic term for Islamic State.