email

Every user who had a Yahoo account in August 2013 was likely affected by its massive hack, the company's parent, Verizon, said Tuesday.

This latest disclosure triples the number of accounts compromised by the major 2013 data breach that the company disclosed late last year. At the time, Yahoo said hackers had stolen data associated with 1 billion user accounts; the new disclosure escalates that number to 3 billion.

Updated at 7:00 p.m. ET

Yahoo says hackers stole names, email addresses, phone numbers, dates of birth and encrypted or unencrypted security questions and answers from more than 1 billion accounts.

In a statement posted to its website on Wednesday, the company said it had "taken steps to secure user accounts and is working closely with law enforcement."

The statement continued: