A long-awaited report from the U.N. human rights office says China’s discriminatory detention of Uyghurs and other mostly Muslim ethnic groups in the western region of Xinjiang may constitute crimes against humanity.

GENEVA (AP) — China's discriminatory detention of Uyghurs and other mostly Muslim ethnic groups in the western region of Xinjiang may constitute crimes against humanity, the U.N. human rights office said in a long-awaited report Wednesday, which cited “serious” rights violations and patterns of torture in recent years.

The report seeks “urgent attention” from the U.N. and the world community to rights violations in Beijing's campaign to root out terrorism.

U.N. human rights chief Michelle Bachelet, facing pressure on both sides, brushed aside multiple Chinese calls for her office to withhold the report, which follows her own, much-criticized trip to Xinjiang in May. Beijing contends the report is part of a Western campaign to smear China's reputation.

The report has fanned a tug-of-war for diplomatic influence with the West over the rights of the region’s native Uyghurs and other ethnic groups.

The report, which Western diplomats and U.N. officials said had been all but ready for months, was published with just minutes to go in Bachelet's four-year term. It was unexpected to break significant new ground beyond sweeping findings from researchers, advocacy groups and journalists who have documented concerns about human rights in Xinjiang for several years.

But the 48-page report comes with the imprimatur of the United Nations and its member countries — notably including rising superpower China itself. The report largely corroborates earlier reporting by advocacy groups and others and injects U.N heft behind the outrage that victims and their families have expressed about China's policies in Xinjiang.

“Beijing’s repeated denial of the human rights crisis in Xinjiang rings ever-more hollow with this further recognition of the evidence of ongoing crimes against humanity and other human rights violation in the region,” Agnes Callamard, Amnesty International's secretary-general, said in a statement.

The run-up to the report's release fueled a debate over China’s influence at the world body and epitomized the on-and-off diplomatic chill between Beijing and the West over human rights, among other sore spots.

China shot back, saying the U.N. rights office ignored human rights “achievements” made together by “people of all ethnic groups in Xinjiang.”