Hacker group Lulz Security (LulzSec) has offered help to Japanese video game developer Sega which disclosed on Sunday that hackers have stolen the personal information of 1.3 million customers from its database.

The hacker group, which has claimed responsibility for recent hack attacks on InfraGard and PSB, has offered to track down and punish the hackers who breached Sega’s network.

Sega is the latest game companies to be hacked. It said that details such as names, birth dates and e-mail addresses of its members had been compromised. It added that the encrypted passwords of users of Sega Pass online network have been stolen as well.

However, Sega has payment data such as credit card numbers was safe.

On Friday, Sega sent an email to users of the Sega Pass system warning them of the breach.

A Sega spokeswoman Yoko Nagasawa told Reuters, "We are deeply sorry for causing trouble to our customers. We want to work on strengthening security."

Nagasawa added that it is unclear when the services would be restored. The Sega Pass has been shut since 16 June.