Egypt launched air strikes in North Sinai on Saturday, killing 12 militants, security sources said, and the Egyptian president visited the restive province where the bloodiest fighting in years erupted earlier this week. The sources said the air strikes hit militant targets near Sheikh Zuweid in North Sinai province, killing 12 militants and destroying weapons and explosives caches. The sources also said that border security forces had found about half a ton of explosives in a tunnel on the border between Egypt and Gaza. North Sinai has been the epicentre of an insurgency in Egypt where an Islamic State-affiliated group, Sinai Province, is most active. The Peninsula borders the Gaza Strip, Israel and the Suez Canal.