"We came to the conclusion that these activities that were conducted in Canada by TikTok and their offices would be injurious to national security," he told CBC News. "I'm not at liberty to go into much detail, but I know Canadians would understand when you're saying the government of Canada is taking measures to protect national security, that's serious." "Obviously, parents and anyone who wants to use social platform should be mindful of the risk," he said. The Canadian Security Intelligence Service (CSIS) has warned Canadians, including teenagers, against using TikTok. Later that year, it ordered a national security review of the app.