GENEVA (AP) — Investigators working for the U.N.’s top human rights body said today that top Myanmar military leaders should be prosecuted for genocide against Rohingya Muslims.

The call, accompanying a first report by the investigators, amounts to some of the strongest language yet from U.N. officials who have denounced alleged human rights violations in Myanmar since a bloody crackdown began last August.

The three-member “fact-finding mission” working under a mandate from the U.N.-backed Human Rights Council meticulously assembled hundreds of accounts by expatriate Rohingya, satellite footage and other information to assemble the report.

The U.N.-backed Human Rights Council created the mission six months before a rebel attack on security posts set off the crackdown that drove hundreds of thousands of Rohingya fleeing to neighboring Bangladesh.

Through hundreds of interviews with expatriate Rohingya and use of satellite footage, the team compiled accounts of crimes including gang rape, the torching of hundreds of villages, enslavement, and killings of children — some before their eyes of their own parents. The team was not granted access to Myanmar and has decried a lack of cooperation or even response from the government, which received an early copy of the report.