Nanning sinkhole
© South China Morning Post
A five-metre-wide sinkhole has appeared outside the gate of a primary school in southwestern China, mainland media report.

Luckily no one was injured because the ground collapsed at 8am on Sunday when Xiuling Primary

School in the city of Nanning, in Guangxi province, was closed, the China News Service reported.

Police quickly arrived at the scene of the sinkhole to block off the pavement and road near the school's entrance.
Nanning sinkhole
© South China Morning Post
An initial investigation found the sinkhole was caused by heavy rainfall over a number of days, which had led to the flooding of an underground basement, the report said.

Road collapses often occur in mainland cities during rainy days because of the poor quality of the infrastructure projects, experts said.

Two weeks ago, four cars were swallowed up after a three-metre-deep sinkhole, stretching five metres across and four metres wide, appeared in Ruijin in Jiangxi province, the news portal 163.com reported.
Nanning sinkhole
© South China Morning Post