China's search engine giant Baidu has been urged to clean up improper content after its online storage service was found to have pornographic files.

The warning came after investigations by Beijing's cultural administrative authorities confirmed public tip-offs that some accounts on Baidu Cloud (pan.baidu.com) contained obscene and pornographic content, said a statement released Sunday by Beijing's anti-pornography and anti-illegal publications office.

According to the office, the company has been warned against slack supervision of its storage service and urged to "promptly delete all files in question, shut down accounts uploading such content and present a report on its clean-up effort."