Shut down after attack from hacker, Sony said Tuesday it will restore its PlayStation Network by the end of May.

Last month, PlayStation Network was targeted by hackers. According to Satoshi Fukuoka, Sony Computer Entertainment Inc. spokesman, personal data from 24.6 million user account was stolen in the attack.  

But Sony doesn't announce the exact time when the services will be restored. They said, they need at least a few more days.

According to Sony, 77 million PlayStation and Qriocity accounts have been affected along with 25 million Sony Online Entertainment accounts, bringing the total to more than 100 million.

Sony spokesman Patrick Seybold apologized in a statement posted on the PlayStation blog, We're terribly sorry for the inconvenience and appreciate your patience as we work through this process. Sony promises they will continue to investigate into the hacker attack.

The PlayStation Network system was launched in 2006 allowing PS3 console gamers to compete online, stream movies and access other services via the Internet.