Irish investigators said TikTok did not protect the data of users in the European Union, improperly transferring some of it to China. TikTok said it would appeal.

European Union privacy watchdogs fined TikTok 530 million euros ($600 million) on Friday after a four-year investigation found that the video sharing app's data transfers to China breached the EU's strict data privacy rules.

TikTok was fined €530 million ($601 million) by a European regulator for illegally sending personal data of users to China. But the Chinese-owned social video platform said it was being "singled out" and contested the ruling,