The Amnesty International says it has evidence that forces loyal to Libyan fugitive ruler Muammar Gaddafi have killed at least 150 detainees at two military camps in the capital Tripoli. Escaped prisoners told the human rights body that on August 23, guards at a camp in Khilit al-Ferjan in southwestern Tripoli told the 160 detainees there that doors were unlocked but as they tried to make a break the guards opened fire and threw grenades at the fleeing group, the website of International Amnesty reported on Friday. Five detainees, arrested with 70 other people during the conflict and held in solitary cells, were killed by Gaddafi forces at Qasr Ben Ghashir military camp on August 24, the report added.