https://www.reuters.com/article/us-italy-tik-tok-regulator/tiktok-agrees-to-block-users-in-italy-who-say-they-are-under-13-after-girl-dies-idUSKBN2A31T6 >The popular video app TikTok said on Wednesday it had agreed with Italian authorities to block all users who gave their age as under 13, among other measures, after the death of a 10-year-old girl was blamed on a breath-holding social media challenge.