The Beijing Office of the Central Cyberspace Affairs Commission said in a post on its official WeChat account on Wednesday that Sina's platforms were disseminating untrue information and pornography, impacting public opinion.

The regulator, citing an unnamed Sina executive, said the company will suspend its desktop-based Sina blog platform, as well as apps such as Sina News for a month to make rectifications.

Sina did not immediately respond to Reuters' requests for comment.

Sina also runs Twitter-like Weibo, which is one of the biggest social media platforms in China. The regulator's statement did not mention Weibo.

China has been tightening its controls over internet content as part of efforts to maintain "social stability" which has included the shutting down of thousands of websites and social media accounts.

(Reporting by Brenda Goh; Additional reporting by Pei Li and Shanghai Newsroom; Editing by Muralikumar Anantharaman)