Sony said it had found a "large amount" of unauthorized sign-in attempts on its PlayStation Network and other online entertainment services, and that it has temporarily suspended about 93,000 user accounts for those services.

The attempts took place between October 7 and 10 and succeeded in verifying valid sign-in IDs and passwords of about 93,000 accounts on its PlayStation Network, Sony Entertainment Network and Sony Online Entertainment services, said a Reuters report.

Sony has temporarily locked these accounts and is continuing investigations into the extent of unauthorized activity. It said it would notify affected account holders to advise them to reset their passwords, the report said.