Three Chinese government agencies are planning to tell Apple to "tighten up checks" on live-streaming software offered on its app store, which can be used to violate internet regulation in the country. "Law enforcement officers had already met with Apple representatives over live-streaming services, [state news agency Xinhua reported], but did not provide details of the meetings," reports The Guardian. From the report: The inquiry appears to be focused on third-party apps available for download through Apple's online marketplace. The company did not respond to requests for comment. China operates the world's largest internet censorship regime, blocking a host of foreign websites including Google, Facebook, Twitter and Instagram, but the authorities have struggled to control an explosion in popularity of live-streaming video apps. As part of the inquiry into live-streaming, three Chinese websites -- toutiao.com, huoshanzhibo.com and huajiao.com -- were already found to have violated internet regulations, and had broadcast content that violated Chinese law, including providing "pornographic content," the Xinhua report said. Pornography is banned in China. The three sites were told to increase oversight of live-broadcasting services, user registration and "the handling of tips-offs." Two of the websites, huoshanzhibo.com and huajiao.com, were under formal investigation and may have their cases transferred to the police for criminal prosecutions, the Xinhua report said. Casting a wide net, the regulations state that apps cannot "engage in activities prohibited by laws and regulations such as endangering national security, disrupting social order and violating the legitimate rights and interests of others."