Seven Egyptian police officers and four militants were killed in a clash in the north of the Sinai Peninsula, the interior ministry said.
The clash happened on Tuesday when militants attacked forces stationed south-west of Arish.
Islamic State claimed the attack, saying it carried out simultaneous raids on military positions in Arish, according to a statement on the group’s Amaq news agency.
Security sources said the militants used more than 10 four-wheel vehicles in co-ordinated attacks at four sites.
Egyptian security forces have been battling Islamist militants in the Sinai Peninsula for years and launched a counter-insurgency campaign in the area in February 2018.
Earlier this month militants attacked a checkpoint in North Sinai, an assault that left eight security personnel dead according to the interior ministry.