Three Israeli soldiers and an Egyptian security officer were killed near the countries’ border on Saturday, Israel and Egypt said, in a rare incident that the countries said they are investigating jointly. According to international media reports, Egypt’s military said that the three Israeli and one Egyptian security personnel had been killed in an exchange of fire as the Egyptian security officer chased smugglers across the frontier. As per reports, the Israeli military said an Egyptian policeman shot and killed two soldiers while they secured a military post at the Egyptian border early on Saturday. It said the officer and a third Israeli soldier were killed in a confrontation inside Israeli territory hours later. Egyptian and Israeli officials are probing the circumstances of the incident in full cooperation. The Israeli military said it was unclear how the Egyptian officer crossed the border fence and soldiers were searching the area to rule out additional assailants. An Israeli military spokesperson said two soldiers had been shot while on duty in a relatively desolate area in the Negev desert along the Egypt border early on Saturday. Their bodies were found later.