TWITTER users in Gloucestershire could be among the 250,000 people whose personal information was targeted by hackers.
The social media giant has revealed that online rogues tried to gain access to account information earlier this week.
User names, email addresses and encrypted passwords may have been seen by the web criminals.
Twitter bosses have reset the pilfered passwords and sent notification emails to affected users.
Twitter said in its blog that the attack "was not the work of amateurs, and we do not believe it was an isolated incident".
Were you one of the affected Twitter users? Call the Echo on 01242 278081.