Egypt's army said on Wednesday it had foiled an attack against security forces in the North Sinai region, killing seven suspected militants and destroying two weapon caches, Reuters reported. The announcement by the army spokesman on his Facebook page came hours after a police officer was killed and four others were wounded when their armoured vehicle hit a roadside bomb in El-Arish, the provincial capital, security and medical sources said. The army said it had received intelligence that 'terrorist elements' were transferring rocket-propelled grenades, machine guns and C4 explosives from Rafah to the town of Sheikh Zuweid in an attempt to carry out an attack against security forces.