Two police officers and a conscript were gunned down by unknown assailants while driving near al-Arish Police Station in North Sinai on Wednesday, the ministry of interior announced.
The ministry mourned the policemen's death in a statement, saying they have "sacrificed their lives for the nation."
Militants have stepped up attacks targeting security forces in Egypt, particularly in the Sinai Peninsula, since the army's ouster of Islamist President Mohamed Mursi in July 2013, which followed mass protests against his rule.
At least 30 military personnel were killed in a suicide blast which targeted a security checkpoint in Sinai's Sheikh Zuweid on October 24, in the worst militant attack since Mursi's ouster.
Egypt's most dangerous militant group, the Sinai-based Ansar Bayt al-Maqdis, claimed responsibility for the attack in a video released on November 14, shortly after pledging allegiance to the leader of the Islamic State fighters in Iraq and Syria.
President Abdel Fattah al-Sisi declared a three-month state of emergency and a nighttime curfew in parts of the Sinai Peninsula in response to the attack.