Three Egyptian soliders were killed on Tuesday in the Sinai peninsula, Reuters' Aswat Masriya has reported.
A conscript was shot dead by unidentified assailants in the city of Al-Arish in North Sinai.
The attackers were riding a car when they shot the conscript near Al-Arish's central security headquarters.
Earlier during the day, two soldiers were killed when a roadside bomb struck their armoured vehicle near Al-Kharouba in North Sinai.
Security sources told Reuters that the attack took place when suspected militants remotely detonated a bomb as security forces were patrolling the area.
Six other soldiers were also wounded in the explosion, the sources added.
The northern part of the Sinai peninsula, adjoining Israel and the Palestinian Gaza strip, has long been a haven of Islamist insurgency. But militant violence, mainly based in the mountainous region, has increased since the 2013 ouster of Islamist president Mohamed Morsi.
Attacks and bombs by militants have killed hundreds over the past 18 months, mainly security forces in North Sinai, though smaller-scale bombings and shootings have become commonplace in the capital and other parts of the country.