A landslide that hit Ganluo county of Liangshan Yi autonomous prefecture in Sichuan province left 24 people buried on Wednesday.
Eleven were rescued and 13 remained missing, according to the Ganluo county information office.
The landslide occurred at noon in the Lianghong-Aidai section of the Chengdu-Kunming railway.
Affected by rainstorms and landslides, the section has been damaged repeatedly since July.
In the aftermath, passenger trains between Chengdu, capital of Sichuan, and Xichang, capital of Liangshan, have been halted, China Railway Chengdu Group said.