"We want to clear something up regarding the Momo Challenge: We've seen no recent evidence of videos promoting the Momo Challenge on YouTube," the company tweeted. "Videos encouraging harmful and dangerous challenges are against our policies."
YouTube encouraged users to flag questionable videos. The company also noted in a blog post that creators are allowed to discuss, report or educate people about the Momo Challenge or character. YouTube said that images of Momo won't be allowed on YouTube Kids, however, and that it's putting safeguards in place to exclude it from content.
The supposed Momo Challenge reportedly originated on the WhatsApp messaging platform, went viral last year and then largely disappeared. The challenge involves Momo, a gruesome puppet-like creature that instructs kids to complete a series of challenges, including harming themselves and others.
However, charities like the Samaritans and the National Society for the Prevention of Cruelty to Children have said the challenge is a malicious hoax, reported The Guardian on Thursday, and that there's no confirmed evidence it poses a threat to children.
The image of Momo, in fact, is a sculpture called "Mother Bird" by Japanese artist Keisuke Aisawa. There doesn't appear to be any link between the artist and the challenge.
First published Feb. 28 at 11:11 a.m. PT.
Update, 1:07 p.m.: Adds more information from YouTube.