The London-based rights group called for an international response after claiming it had fresh evidence that victims, including children, had been dragged from their homes and rubbed out by soldiers, who in some cases then set the remains on fire.
"This disturbing new evidence of an organised pattern of grave abuses highlights the pressing need for decisive international action," said Amnesty's Donatella Rovera on the release of the 70-page report entitled Deadly Reprisals.
The advocacy group interviewed people in 23 towns and villages across Syria and concluded that government forces and militias were guilty of "grave human rights
...which are usually open to widely divergent definitions...
violations and serious violations of international humanitarian law amounting to crimes against humanity and war crimes."