Gunmen attacked two security checkpoints in the North Sinai city of Arish on Wednesday evening, a security source told Anadolu Agency.
Shortly after iftar (the fast-breaking meal during the Islamic month of Ramadan), gunmen opened fire at a security post in southern Arish and another near the Arish airport, the source said.
Although security forces returned fire, no casualties were reported.
According to eyewitnesses, several powerful explosions and exchanges of fire were heard in southern Arish.
In a separate incident early Wednesday morning, six army personnel and one civilian were injured in a rocket attack on army and security posts in the North Sinai town of Rafah.
Egypt's Sinai region has suffered a spate of violence since elected President Mohamed Morsi was ousted by the military on July 3.
At least 16 people, both civilian and security personnel, have been killed in militant attacks across the peninsula since Morsi's removal.
The army began a major offensive in Sinai this week aimed at hunting down armed groups believed to have carried out recent attacks on security facilities and checkpoints.