At least four Egyptian Soldiers have been killed after an armoured personnel carrier exploded on the outskirts of the city of Arish in the Sinai Peninsula, security and medical sources say. An improvised explosive device was planted on the road and remotely detonated as the vehicle conducted a search operation, the sources said. Twelve others were injured in the incident. Egypt’s official military spokesman could not immediately be reached for comments. Egypt has been battling a growing number of insurgents since the 2013 overthrow of President Mohammed Morsi. The insurgency, mounted by militants affiliated to the Islamic State group, has killed hundreds of soldiers and police and started to attack western targets within the country.