On Sunday morning a landslide caused more than 20 buildings to collapse in an industrial park in Guangming New District, Shenzhen.

The exact number of casualties remains unknown.

Seven fire engines and 194 firefighters have been sent to the site.

So far, seven people have been rescued.

A worker at the industrial park said four people from his hometown were buried, including three children.

Guangming New District, located in northwest of Shenzhen, has a population of 110,000.

In 2014, the district registered more than 22,000 enterprises and 125 high-tech companies.