Social media app TikTok has taken down accounts that were posting propaganda videos for ISIS, a company employee said Tuesday. TikTok, which is owned by Chinese firm ByteDance, claimed some 500 million users globally last year, making it one of the most popular social apps. An employee at TikTok told Agence France Presse that about 10 accounts were removed for posting the videos. "Only one of those videos even had views that reached into double digits before being taken down," said the staffer, who declined to be named. The videos featured corpses being paraded through streets and ISIS militants with guns, according to the Wall Street Journal, which first reported the story on Monday. The Journal said the posts were from about two dozen accounts, which were identified by social media intelligence company Storyful. "Content promoting terrorist organizations have absolutely no place on TikTok," the company said in a statement emailed to AFP. "We permanently ban any such accounts and associated devices as soon as identified, and we continuously develop ever-stronger controls to proactively detect suspicious activity," it said. The TikTok platform, which allows users to create and share videos of 15 seconds, is particularly popular with teenagers. "Unlike other platforms, which are centered around users friends or communities, TikTok is based on engaging with a never-ending stream of new content," said Darren Davidson, the editor-in-chief of Storyful. "The ISIS postings violate TikToks policies, but the sheer volume of content makes it difficult for TikTok to police their platform and root out these videos," he said.