Microsoft is investigating possible fraud on its Xbox Live online gaming service...The investigation comes after gamers reported having their Xbox Live accounts hijacked and their credit cards used to buy "Microsoft Points," the virtual currency on Xbox Live...While some users believe the security of Xbox Live was breached, others suggest that users were tricked into giving up enough information while in a game so fraudsters could call Microsoft to change the account information....

Months after Xbox Live users began complaining of hacked accounts, Microsoft yesterday admitted that the service's support staff is at fault...