The military conducted raids at the militant hideouts in the North Sinai's cities of Sheikh Zwayied and Rafah and killed seven militants.
During the raids, seven other militants were also arrested.
Egypt's Sinai has witnessed many violent attacks by militants since the January, 2011 revolution that toppled ex-president Hosni Mubarak.
The attacks targeting police and military increased after the ouster of Islamist ex-president Mohamed Morsi in 2013.
The military has launched security campaigns in the area, arrested suspects and demolished houses that belong to terrorists, including those facilitating tunnels leading to the Gaza Strip.