Staff working at the European Commission have been ordered to remove the TikTok app from their phones and corporate devices.
The commission said it was implementing the measure to protect data and increase cybersecurity.
TikTok, owned by Chinese company, ByteDance, has faced allegations that it harvests users’ data and hands it to the Chinese government.
TikTok insists it operates no differently from other social media.
European Union (EU) industrialist, chief Thierry Breton told a news conference that the union’s executive is very focused on cybersecurity, declining to provide further details.
BBC says the ban also means that European Commission staff cannot use TikTok on personal devices that have official apps installed.