circulate online. and so far, they posted an update on twitter basically saying what they have and have not been able to find. the platform writing they've exhaustively searched for content that promotes violence at schools today. but have still found nothing. what we find, they write, are videos discussing this rumor and warning others to stay safe. tiktok going on to write, local authorities, the fbi and dhs have confirmed there's no credible threats. we're working to remote alarmist threats that violate our policy. and they lay out that policy there. but in the end this is all coming amid growing calls for social media platforms like tiktok to be more proactive and to be more responsible in the way that it monitors its content to try to keep things like this from happening again. it did lead to some serious concerns for parents and students across the country. >> polo, authorities took this threat seriously. some school districts shut down today. what are officials saying about the reaction to this?