AT&T Inc., the largest U.S. telephone company, notified some of its customers of an effort to break into their online accounts.

“We recently detected an organized and systematic attempt to obtain information on a number of AT&T customer accounts, including yours,” AT&T said in an e-mail to customers. “We do not believe that the perpetrators of this attack obtained access to your online account or any of the information contained in that account.”

(Source: Bloomberg)