Video game developer Sega says it has been hacked, making it the latest in a string of games companies to be attacked.
The company sent an email to users of the Sega Pass system on Friday to warn them that email addresses, dates of birth and encrypted passwords had been stolen from online database.
The email stressed that no financial information was at risk and that it has launched a probe into the extent of the breach. It is not immediately clear how many users were affected.
The company says its online system has been taken offline and all users' passwords have been reset.
The security breach comes after Sony and Nintendo suffered similar attacks by hackers. Millions of computer game users had their data stolen in those attacks.