Guards employed by...G4S have been accused of using iron bars and rocks to attack detainees at Australia’s offshore immigration detention centre in Papua New Guinea. Though details of the riot remain sketchy, several witnesses have claimed that uniformed local G4S guards were behind the attacks, which left one detainee dead and 77 injured...Local guards from G4S have told reporters they were outnumbered by hundreds of angry detainees who threw stones and shouted insults...G4S said its guards at the centre were not armed and that it was concerned about the allegations. It promised to support an official inquiry. “Our personnel on duty during the disturbances acted with courage, strength and determination to protect those in our care,” the firm said.