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.

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, adding that it would appeal.

TikTok owner ByteDance Ltd. was fined €530 million ($600 million) by the European Union for illegally sending user data to China, warning the firm it didn’t do enough to keep information out of reach from Chinese state services.