Beijing's television and film watchdog has held talks with six news, social media and livestreaming websites to crack down on unapproved online audio and video programs.
The Beijing Municipal Bureau of Press, Publication, Radio, Film and Television accused the websites of not obtaining licenses required for broadcasting online.
The bureau also said the sites broadcast uncensored audio and video programs, and peddled "vulgarity."
The six websites included Sina Weibo, China's top microblogging site, iFeng, a news website, and Miaopai.com, a popular video sharing website.
These sites were asked to remove video accounts from outlets that lack a license and tighten controls over content streamed the sites.
The Beijing Integrated Law Enforcement on Cultural Market said it had launched investigations into all six websites.