TRIPOLI - New evidence implicates Libyan militias in an apparent execution of dozens of detainees in rebel custody following the capture and death of Muammar Gaddafi last year, Human Rights Watch said.

In a report released on Wednesday detailing Gaddafi's final hours on Oct. 20, 2011, the rights group said it had gathered evidence that Misrata-based militias captured and disarmed members of the dictator's convoy and subjected them to brutal beatings.

HRW said militias killed dozens of them in a nearby hotel in what it said constituted the largest documented execution of detainees by anti-Gaddafi forces during last year's conflict.

Gaddafi and his son Mo'tassim were captured in his hometown Sirte two months after rebels seized Tripoli. They died while in the custody of fighters loyal to the country's new leadership, and their bodies were put on display in Misrata.

"The evidence suggests that opposition militias summarily executed at least 66 captured members of Gaddafi's convoy in Sirte," Peter Bouckaert, emergencies director at HRW, said in a statement.

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