Twitter said it had locked down and called for a password reset of some accounts after an unconfirmed claim of a leak of nearly 33 million usernames and passwords to the social network. The company said the information was not obtained from a hack of its servers, and speculated that the information may have been gathered from other recent breaches or malware on victim machines that are stealing passwords for all sites. Twitter did not specify how many users were notified and forced to change their passwords but said that the total is in the millions.”]
Source: https://www.csoonline.com/article/3082045/twitter-locks-some-accounts-after-passwords-exposed.html