Dramatic new allegations have been made about a massacre allegedly committed by pro-government forces in western Sudan. New York-based group, Human Rights Watch says it has established that pro-government militias executed 136 men in a coordinated operation last month. The allegation comes as the United Nations Human Rights Commission adopted a watered down statement on Darfur. The United States had pushed for a much harder hitting resolution criticising Sudanese government abuses. The more softly-worded compromise expresses concern at the situation in the Darfur region, welcomes plans to send a high-level team there to investigate and urges all sides in the conflict to comply with a ceasefire agreement. However, rather than condemning Sudan, it expresses solidarity with the country in overcoming the presesnt situation. It was voted against by the US. "Ten years from today the only thing that will be remembered about the 60th Commission on Human Rights is whether we stand up on the ethnic cleansing going on in Sudan," US delegation head Richard Williamson told AFP news agency. The UN says more than 10,000 people have been killed and over one million displaced over the past year as a result of conflict in Darfur. HRW says last month, men from the Fur ethnic group were rounded up with the help of government forces, and delivered to their place of execution in army lorries. The Sudanese government has not responded to the report. A UN mission is due to travel to Darfur on Friday to investigate allegations of atrocities there. Human rights campaigners expressed outrage on Thursday that a leaked United Nations report strongly critical of the Sudanese government was withheld from the UN debate. The report, seen by the BBC, details claims of rape, looting and killing of non-Arabs by militias with government help. It says the atrocities in Darfur "may constitute war crimes and/or crimes against humanity". It was compiled by a UN team of experts who visited Chad to speak to refugees from the conflict. Sudan was accused of delaying the team's trip to Darfur to prevent evidence of atrocities coming under discussion. Jemera Rone of Human Rights Watch told BBC News Online: "The Sudanese government is playing games with the international community, trying to delay the day of reckoning and prevent any systematic monitoring of its atrocities in Darfur." The UN secretary general himself has talked of his sense of foreboding over the situation in Darfur, drawing parallels with the situation before the Rwandan genocide. Talks aimed at ending the fighting in neighbouring Chad are reported to be making little progress.