One soldier was killed when unknown assailants attacked an ambush on the Airport-Arish road in North Sinai late on Monday. 

A security source said that the soldier, Ahmed Abdel Kareem, died after receiving a bullet to the head in the attack. 

The source added that security forces responded with gunfire, but the perpetrators were able to escape. 

Four other army conscripts were also killed in a shooting in Arish earlier today. 

Attacks on security forces have increased in the lawless peninsula since the ouster of Islamist President Mohamed Mursi.