The UN Human Rights Council on Friday voted to send a team of investigators to probe alleged violations, including extrajudicial executions and torture, in crisis-wracked Venezuela.
The country's President Nicolas Maduro faces mounting pressure from world powers who accuse him of violently cracking down on dissent over Venezuela's economic collapse in recent years.
A resolution tabled by more than a dozen countries from Latin America and elsewhere was adopted by the 47-member council with 19 votes in favor, seven opposed and 21 abstaining.
It called for the UN's top rights body to dispatch urgently an independent international fact-finding mission to Venezuela.
The mission, the text said, should investigate extrajudicial executions, enforced disappearances, arbitrary detentions and torture and other cruel, inhumane or degrading treatment in Venezuela since 2014.
Venezuelans, men and women, cannot wait any longer for justice, said Silvia Elena Alfaro Espinosa, the representative of Peru, on behalf of the sponsoring nations, who also included Argentina, Australia, Brazil, Canada and Israel.
The one-year mission should carry out its investigation with a view to ensuring full accountability for perpetrators and justice for victims, said the text, which also received the backing of the European Union.
Venezuelan Ambassador Jorge Valero slammed the resolution as a hostile initiative, and said his country had no intention of cooperating with the new probe.
Imposing additional monitoring mechanisms will never envoy the consent of my country and our people, he told the council.
Even when they are not granted access to a country, UN investigators can nonetheless carry out probes from abroad, as has been the case with investigations into abuses in Syria and Myanmar.
The investigative team will be expected to present a report to the council in a year.
Friday's UN resolution deplored the systematic abuse of state institutions ...
accelerating the erosion of the rule of law and of democratic institutions in Venezuela.
It also urged Caracas to release all political prisoners and voiced grave concern over UN rights office findings in July which suggested that many of the more than 6,000 killings in alleged confrontations with state forces since early 2018 may in fact have been executions.
When violations of this gravity and scale are reported to us, we must respond in an equally serious manner, British Ambassador Julian Braithwaite, whose country backed the resolution, told the council before the vote.
A week ago, she and Venezuelan Foreign Minister Jorge Arreaza signed a Memorandum of Understanding establishing a framework for future discussion and cooperation.
Among other things it would enable two UN rights officers to settle in the country, and be given access to places of detention.
Bachelet, a former president of Chile, herself had appeared reluctant to back the establishment of a UN investigative body.
The UN rights chief, who recently visited Venezuela and has been working to set up an office there, told journalists earlier this month that her main priority was to establish a monitoring and reporting presence in the country.