""It also found indications that on several occasions the rebels in Benghazi appeared to have knowingly made false claims or manufactured evidence...".Rebels have repeatedly charged that mercenary troops from Central and West Africa have been used against them. The Amnesty investigation found there was no evidence for this. "Those shown to journalists as foreign mercenaries were later quietly released," says Ms Rovera. "Most were sub-Saharan migrants working in Libya without documents...""...There is no evidence that aircraft or heavy anti-aircraft machine guns were used against crowds. Spent cartridges picked up after protesters were shot at came from Kalashnikovs or similar calibre weapons. The Amnesty findings confirm a recent report by the authoritative International Crisis Group, which found that while the Gaddafi regime had a history of brutally repressing opponents, there was no question of "genocide"...."