A shoe factory collapsed in eastern China during a weekend shift, killing at least 13 people and injuring more than 30, state media reported.

One other person remained missing following the collapse Saturday afternoon in the Zhejiang province city of Wenling, and nine people escaped.

Rescuers pulled 42 people from the rubble and sent them to a hospital, where nine of them died, the Wenling city government said on its microblog. They later pulled four bodies from the wreckage on Sunday.

The cause of the accident is under investigation.