An untold number of Twitter users Thursday received suspicious emails alerting them their passwords had been reset following a loosely defined, third-party hack. The emails are apparently legitimate, though they were sent to more than victims of compromised accounts. Twitter officials have not disclosed how many uncompromised accounts had passwords reset, nor any more on the attack that led to those actions. Some victims reported having select tweets deleted, while others started sending out spam. The social media site currently has 140 million active users.
Source: https://threatpost.com/twitter-resets-more-passwords-accounts-hacked-110812/77202/