sentences:  Human Rights Watch investigations found "no evidence to sustain claims of massacres or large-scale extrajudicial executions by the IDF in Jenin refugee camp" although they reported that "Israeli forces committed serious violations of international humanitarian law, some amounting prima facie to war crimes".The accusation of war crimes was repeated by Amnesty International.Human Rights Watch estimates that between 53 and 56 Palestinians were killed during the Israeli offensive, just over half of them suspected to be armed combatants.