The European Union's executive has opened a formal investigation into TikTok because of "serious indications" of foreign interference in the recent Romanian presidential election using the video-sharing platform.
The second-round vote was cancelled earlier this month after declassified intelligence documents revealed 25,000 TikTok accounts were suddenly activated weeks before polls opened in the first round.
The accounts backed the independent candidate Calin Georgescu, a largely unknown far-right campaigner who described Russia's Vladimir Putin as a "patriot and a leader", although he denied being a fan.
European Commission President Ursula von der Leyen said democracies had to be protected from foreign meddling.