In mid-2017, the Arakan Rohingya Salvation Army (ARSA) committed "serious human rights abuses... Including unlawful killings and abductions", CNN reported on Tuesday citing the report. At the same time, the ARSA engaged in "scores of clashes with security forces".
The Myanmar government has blamed the ARSA for attacking border guards and sparking a violent crackdown which has seen hundreds of thousands of Rohingya Muslims flee Myanmar into neighbouring Bangladesh.
On August 25, 2017, ARSA militants attacked a Hindu village in Maungdaw and rounded up some 69 men, women, and children, the majority of whom were killed, "execution-style", according to survivors who spoke to Amnesty.
The same day, 46 members of a Hindu community in a nearby village disappeared.
The ARSA was able to recruit some villagers to help carry out the attack, but the "overwhelming majority of Rohingya did not", Amnesty said in its report, which it based on interviews with survivors and photographic evidence of the scene analysed by forensic anthropological expert.
The Myanmar government has declined to comment on the Amnesty report.