At least three policemen and four civilians were injured today when a roadside bomb went off in Egypt's restive North Sinai Governorate.
The bomb, planted by unknown militants in Al-Arish city, exploded when an armoured police vehicle was nearby, officials said.
The injured were admitted to a hospital as security forces searched the area for the attackers.
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The attacks targeting police and military increased after the ouster of Islamist president Mohamed Morsi in 2013 by military following massive protests against his rule.
More than 600 security personnel have been reported killed since then.
The military has launched security campaigns in the area, arrested suspects and demolished houses belonging to terrorists, including those facilitating tunnels leading to the Gaza Strip.