AT&T has launched an investigation into the source of a data leak that includes the personal information of 73 million current and former customers.

In a news release Saturday morning, the telecommunications giant said the data was “released on the dark web approximately two weeks ago,” and contains information such as account holders’ Social Security numbers.

“It is not yet known whether the data … originated from AT&T or one of its vendors,” the company added. “Currently, AT&T does not have evidence of unauthorized access to its systems resulting in exfiltration of the data set.”

The data seems to have been from 2019 or earlier. The leak does not appear to contain financial information or specifics about call history, according to AT&T. The company said the leak shows approximately 7.6 million current account holders and 65.4 million former account holders were affected.... Read More: WBAL TV