Hangzhou City, Zhejiang Province, east China - April 21, 2016
1. Surveillance video showing traffic police detecting crack on road
2. Cracks
3. Various of traffic police putting warning cones near accident site
4. SOUNDBITE (Chinese) Ye Jianjiang, police officer Ye Jianjiang of West Lake (starting with shot 3):
"We were first thinking of evacuating traffic from the road to ensure that no vehicles would fall into it the pit."
5. Various of road collapsing

A policeman alerted the drivers and pedestrians when he detected a major cave-in at a crossroad in the city of Hangzhou in east China's Zhejiang Province on Thursday.

The accident happened at about 16:18 on the afternoon of April 21 at a crossroad in the downtown area where the traffic has been heavy most of the day.

The two-meter deep crack did not cause any damage and casualties.

As a surveillance video showed, the traffic police detected a long crack on the road surface, then the road collapsed, leaving a pit more than two meters deep. He immediately put up warning cones and diverted the traffic to pass round.