The number of people killed in Sudan following the death of the former rebel leader John Garang has risen to at least 130.Most lives were lost in Khartoum as the capital descended into violence, with Garang’s supporters refusing to believe the helicopter crash in which he died was an accident. Political leaders on all sides have called for calm. Garang was killed on his way back from Uganda. The local press now says the helicopter, which went down in the border area, may not have met safety requirements. Khartoum was quieter overnight but three days of rioting have left the city’s commercial district in ruins and hundreds of people injured. Garang led the mainly-Christian southern Sudanese through two decades of civil war and then negotiated a peace deal with the Islamist government. Its terms included a vice-presidency for Garang and a referendum on secession for the south in six years’ time.