Cairo (CNN) -- Egyptian forces raided a militant area in Sinai on Sunday, leaving five dead as the government struggles to clamp down on attacks against its troops, a security source said.
The raid took place south of Al Gura in North Sinai, said the Egyptian source, who is not authorized to speak to the media and asked not to be named.
The militants opened fire on the government forces with machine guns and rocket-propelled grenades, the source said, without saying whether any troops were killed.
The government forces seized an arsenal of weapons, the source said.
Egyptian forces also confiscated two truckloads of weapons in a town in Sheikh Zuweid, in North Sinai, including rocket-propelled grenades, rockets, hand grenades, machine guns, and explosives similar to the ones used to blow up a pipeline exporting gas to Israel numerous times, the security source said. More weapons were seized in a nearby apartment, the source added.
Three officers were killed Saturday when a police truck overturned while police were chasing militants near El Arish, the source said.
Tensions have soared in the wake of a string of violent acts near the Gaza border.
The raid comes a week after 16 Egyptian soldiers were killed and seven others were wounded in an attack near the Rafah border crossing, when assailants with semiautomatic weapons and hand grenades stole two armored vehicles from Egyptian forces and tried to enter Israel.
Militants and Egyptian security forces also clashed at a checkpoint at Al Reissa in north Sinai on Wednesday.
On Friday, Egyptian President Mohamed Morsy visited the border with Gaza and vowed to bring justice to those affected.