An explosion hit an armoured personnel carrier injuring three policemen in North Sinai's Arish on Monday, Ahram's Arabic news website reported.
The vehicle was hit by a roadside bomb, sources and eyewitnesses told Ahram.
Egypt's army has been fighting a militant insurgency in North Sinai that has killed hundreds of security forces.
A state of emergency that was originally imposed in specific areas of North Sinai in August 2013 has been extend for another three months starting 29 July.
