Data thieves stole the personal information of nearly 5 million people from an unconfirmed number of Chinese online ticket reservation platforms, according to Beijing police, who arrested a suspect in the case.

According to media reports, China Railway’s (CR) official online booking platform 12306  suffered a massive data breach, with information later being sold on the dark web. Compromised data reportedly included names, ID numbers, and passwords.

CR later denied the claims in a Weibo post, saying no users’ information was hacked. However, it warned passengers to avoid booking their tickets on unauthorized third-party platforms.

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Jill Shen

Jill Shen is Shanghai-based technology reporter. She covers Chinese mobility, autonomous vehicles, and electric cars. Connect with her via e-mail: jill.shen@technode.com or Twitter: @yushan_shen