FBI looks into e-mail breach at AT&T

The FBI is investigating "the potential cyberthreat" of a data breach at AT&T that exposed e-mail addresses of more than 114,000 Apple iPad owners. The vulnerability only affected iPad users who signed up for AT&T's 3G wireless Internet service, but federal regulators said it demonstrates the need for security improvements.

A hacker group that calls itself Goatse Security said it tricked an AT&T website into revealing an iPad owner's e-mail address by guessing the code associated with that particular iPad.

Dallas-based AT&T apologized and said it will notify all iPad users whose e-mail addresses may have been accessed through the breach, which it said it has closed. Apple has not commented on the breach, referring all questions to AT&T.