Sony Corp worked for a third day on Sunday to restore services to its PlayStation video gaming network after disruptions that a hacker group said it caused in a Christmas Day attack. It was Sony's second high-profile encounter with hackers this holiday season following the unprecedented attack on its Hollywood studio, which Washington has attributed to the North Korean government and linked to the release of the low-brow comedy "The Interview". The Japanese electronics giant updated a PSN support site on Sunday to show that the PlayStation Network remained offline. "Our engineers are continuing to work hard to resolve the network issues users are experiencing," it tweeted shortly after noon New York time. It also tweeted that service was "gradually coming back online" but that it had no estimate as to when the system would be fully functional. "Thank you for your patience," Sony representatives tweeted in response to inquiries from customers who could not log on to the network.
