A landslide has hit the southern Chinese city of Shenzhen in Guangdong province, burying 22 buildings and leaving 27 people missing, state media report.
A nearby section of China's major West-East natural gas pipeline also exploded, the official China Central Television (CCTV) broadcaster reported on Sunday.
Hundreds of rescuers sifted through rubble looking for survivors after the landslide struck Shenzhen's Liuxi Industrial Park in the city's northwestern Guangming New District in the morning, the official Xinhua news agency said.
Four people have been rescued from the debris, with three sustaining minor injuries, it said, citing rescuers.
As of 9am GMT (8pm AEDT), rescuers had evacuated more than 900 people from the site, said Xinhua.
Xinhua had earlier said at least 41 people were missing, with seven people rescued and one suffering minor injuries.
