Four Egyptian security personnel were killed when a roadside bomb struck their van in the restive North Sinai city of Al-Arish, a security source told Al-Ahram's Arabic site.
Twelve other passengers in the van were injured.
The decade-long Islamist militant insurgency in North Sinai has intensified in the past two years following the ouster of Islamist president Mohamed morsi in 2013, with hundreds of army and police personnel killed.
The army has also announced the killing of hundreds of militants over the same period.
ISIS-affiliate Ansar Beit Al-Maqdis has claimed responsibility for most of the attacks in the peninsula.