AT&T contacting 73 million people about theft of personal data

AT&T officials said they have already reset the passcodes of current users (Ken Howard/Alamy/PA)

Telecommunications giant AT&T has begun notifying millions of customers about the theft of personal data recently discovered online.

The company said on Saturday that a dataset found on the so-called dark web contains information such as social security numbers for about 7.6 million current AT&T account holders and 65.4 million former account holders.