A bus has plunged through a collapsed section of road in north-western China, killing at least six people, authorities said.
Some 1,000 emergency workers and 30 vehicles were sent to the site, the emergency management bureau in the city of Xining said.
Footage apparently shot by security cameras and posted on social media showed the truck gradually settling into the hole while people nearby scrambled for safety.
The collapse Monday afternoon left 16 people in the hospital. The bureau said the bus had been raised from the collapsed 80-square-metre section into which it had fallen.
Footage posted online showed the bus tipped halfway into the chasm that had opened up at a bus stop just outside a health clinic.
Light and smoke were coming to the surface, possibly as a result of the rupture of gas or electricity lines.
Workers using backhoes, dump trucks and other equipment excavated earth around the collapse.
The hilly city of Xining is the capital of Qinghai province, one of China’s poorest regions that lies atop the Tibetan Plateau.
The expedited building of roads, tunnels, bridges and other infrastructure to keep China’s economy strong has often led to corner-cutting on safety, causing fatal workplace and industrial accidents.
Mining had also caused instability in the ground in many areas after years of barely restricted mineral extraction.