At least six people have been killed and 16 injured after a bus collapsed into a sinkhole in central China. The video, filmed in the city of Xining in Qinghai Province on January 13, shows the road suddenly collapsing, swallowing the bus when it was picking up passengers at a stop. A ball of fire and the smoke can be seen bursting out of the huge sinkhole. The gas, electricity and water were shut down immediately to ensure the rescue work could start after the incident happened.