GENEVA, May 18 (Reuters) - The United Nations human rights office on Friday accused Sudanese security forces of killing more than 100 people in indiscriminate machinegun attacks on villages in South Darfur over a three-month period.

In a report covering January-March, U.N. High Commissioner for Human Rights Louise Arbour called on the government to carry out an independent investigation into the attacks near Nyala, in which she said Border Intelligence personnel had been involved.

"In all instances, witnesses described hundreds of heavily armed attackers, many of who were identifed as Border Intelligence personnel," the report said. "During all the incidents, attackers fired indiscriminately from the outskirts of the settlements with heavy machineguns and rocket propelled grenades, before entering the settlements and shooting men."

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