A gypsum mine collapsed on Friday in China's eastern province of Shandong, trapping 29 workers in the wreckage.
Chinese authorities said search and rescue teams pulled out four workers but that 19 of them are still missing.
According to a statement by the Pingyi county government, the gypsum mine belongs to Yurong Commercial and Trade Ltd. Co.
The mine collapse came just days after a landslide from a pileup of construction waste in the southern city of Shenzhen in which one person was killed and 75 people, who are now presumed dead, went missing, AP reported.
Landslides are very common, particularly in southern China, and they are caused by heavy rainfall or earthquakes. A nine-story building had collapsed last May due to a landslide in southwest China.
931 people were killed in mine accidents in China last year.