At least six people are dead and sixteen injured after a massive sinkhole swallowed up a bus in northwestern China on Monday.
Surveillance footage showed passengers boarding the bus when the collapse happened.
The sinkhole swallowed the front of the vehicle, a lamp post and people waiting in line.
Seconds later, an explosion could be seen inside the sinkhole, sending a ball of fire above ground, followed by a thick plume of smoke and a few smaller explosions.
Search and rescue efforts are ongoing.