At least five Iraqi security personnel were killed Thursday when unknown gunmen attacked them south of the iraqi capital, Baghdad, the Iraqi police said. The police added that unidentified gunmen killed security personnel assigned to protect Iraqi oil facilities south of the capital Baghdad during an ambush. The gunmen managed to escape from the scene before the security forces’ arrival, the statement said. Two police officers said the gunmen stormed into a trailer where the policemen were sleeping next to the checkpoint in the district of Jisr Diyala. The officers added that the attack happened at dawn Thursday. The policemen were providing security for a nearby oil pipeline. Although violence in Iraq has ebbed considerably since the height of the insurgency some years ago, militants are still capable of launching deadly attacks against security forces, government officials and civilians.