South Sudan's rebel commander Riek Machar has said his forces were not behind the massacre of hundreds of people in the contested town of Bentiu. The UN has accused them of killing more than 200 people in one mosque alone after driving government forces from the town last week. Video shot by Al Jazeera shows bodies littering the streets of the town and the inside of the mosque. Al Jazeera's Anna Cavell reports from the South Sudanese town of Bentiu.
