CAIRO Ten members of Egypt's military were killed when their vehicles were hit by two improvised bombs during an operation against suspected militants in the Sinai peninsula, the military said on Thursday.
Three officers and seven soldiers were killed, the military said in a statement, adding that its forces killed 15 people and arrested seven others during the raid which it said targeted "highly dangerous terrorists" in the central Sinai area.
Two policemen, an officer and a conscript, were later killed in fighting near a police station in Arish, the capital of North Sinai province the Interior Ministry said in a statement.
Egypt is battling an Islamist insurgency in the rugged and thinly populated northern Sinai, which gained pace after the military overthrew President Mohamed Mursi of the Muslim Brotherhood in 2013 following mass protests against his rule.
The militant group staging the insurgency pledged allegiance to Islamic State in 2014 and adopted the name Sinai Province. It is blamed for the killing of hundreds of soldiers and policemen.
President Abdel Fattah al-Sisi, the former military chief who led the overthrow of Mursi, describes Islamist militancy as an existential threat to Egypt, an ally of the United States. Islamic State controls large parts of Iraq and Syria and has a strong presence in Libya, which borders Egypt.
A spokesman said the military also found and destroyed half a tonne of TNT explosive, and seized two four-wheel drive cars containing hand grenades and hundreds of mobile phones.
(Reporting by Dominic Evans and Ahmed Aboulenein; Editing by Lin Noueihed and Ralph Boulton)