"The NTC firmly believes that these prisoners' rights are important, not just as a matter of principle, but that they will help all Libyans to build peace between themselves once the war is over." She said anyone who broke the rules would be punished, but did not say what the punishment would be. The guidelines call for prisoners to have access to medical care, to be allowed to freely practice their religion and contact their families, and to receive visits from representatives of the International Committee of the Red Cross. The standards may be workable in the rebels' Benghazi stronghold, but it remains unclear how they would be carried out on the front lines, where the poorly equipped rebels don't have communications equipment and medical facilities for themselves, much less for prisoners. "When capturing someone, first make sure whether he is a fighter or a civilian. If he is a civilian, let him go," the Arabic-language guidelines state. Fighters can be held for an initial 48 hours and interrogated, before being referred to the justice system if suspected of crimes such as killing civilians. Before the uprising erupted three months ago, Libya, with a population of about 5.5 million, hosted 2.5 million foreign workers Al-Deghali said about 150 prisoners were being held in Benghazi, the rebel bastion on Libya's northeast Mediterranean coast, and 150 were in Misrata, the rebel-held port in the west that has been under siege for more than two months. The 10 foreigners include Chadians, Ghanaians, Algerians and Egyptians, she said. One European who was in Misrata a month ago, said he saw 27 bodies of what appeared to be sub-Saharan Africans, all shot in the back of the head. "I saw bodies brought in on the back of pickup trucks around Tripoli Street in downtown Misrata," said the man, who didn't want to be identified by name or nationality for fear of reprisal. He said he counted 11 bodies in one truck and nine in another. The rebels told him they were mercenaries from Mali, Chad and Niger, he said. Near Misrata's vegetable market, he said he saw seven more bodies near what appeared to be an "execution ground." All appeared to have been forced to their knees and killed with a bullet to the back of the head. Since then, however, prisoner treatment appears to have improved: Last week, reporters in Misrata were shown prisoners held in two floors of a school, their wounds bandaged, some praying. Amnesty International and the ICRC say they have visited people detained at three or four locations in Benghazi, and both put the number held there at around 200 -- including civilians suspected of supporting Qaddafi. But people are being held at a score or more places in the city, security sources said, including military barracks, government buildings used by some 30 self-appointed rebel internal security units and at some High Court offices. A new interior minister appointed two wee