New Delhi, Feb. 16 -- More than 6,000 people were killed in over three days when a Sudanese paramilitary group unleashed "a wave of intense violence . shocking in its scale and brutality" in Sudan's Darfur region in late October, according to the United Nations.

The Rapid Support Forces' offensive to capture the city of el-Fasher included widespread atrocities that amount to war crimes and possible crimes against humanity, the U.N. Human Rights Office said in a report released on Friday.

"The wanton violations that were perpetrated by the RSF and allied Arab militia in the final offensive on el-Fasher underscore that persistent impunity fuels continued cycles of violence," said U.N. High Commissioner for Human Rights Volker Turk.

The R...