DETROIT (WWJ) – Sony Corporation is investigating the outage of its PlayStation Network, a system that links gamers in live play worldwide.

The company first blogged about the outage Wednesday, and on Thursday said it could take a “full day or two” to get the service back up and running.

Posts on a PlayStation message board on Friday afternoon indicated the system was still down.  Sony did not indicate what it believed to be the cause of the outage.

Perhaps coincidentally, the outage comes just after Tuesday’s release of the game “Mortal Kombat,” which is available on the PlayStation 3 and Microsoft Corp.’s Xbox 360.