Oct 26 (Reuters) - TikTok Inc won dismissal of a lawsuit accusing it of causing the death of a 10-year-old girl by promoting a deadly "blackout challenge" that encouraged people to choke themselves on its video-based social media platform.U.S. District Judge Paul Diamond in Philadelphia ruled Tuesday that the company was immune from the lawsuit under a part of the federal Communications Decency Act that shields publishers of others' work.In December 2021, Nylah attempted the blackout challenge using a purse strap hung in her mother's closet, losing consciousness and suffering severe injuries, according to the lawsuit.TikTok and ByteDance moved to dismiss the case, saying that under Section 230 of the Communications Decency Act, they could not be held liable for publishing third-party content.TikTok and other social media companies, including Facebook and Instagram parent Meta Platforms Inc (META.O) and YouTube parent Alphabet Inc (GOOGL.O), are facing a growing number of lawsuits around the country seeking to hold them liable for causing young people to become addicted to their products, and in some cases causing harm including eating disorders, self-injury and suicide."