Twitter has been attacked by anonymous online hackers last week which may have compromised the account details of 25,0000 users, revealed Twitter on Friday.
The micro-blogging site also said that the anonymous hackers may have accessed the usernames, email addresses and encrypted passwords in the latest security breach.
The blog posted by the Twitter information security director Bob Lord added that the recent attack has been investigated thoroughly.
"This attack was not the work of amateurs, and we do not believe it was an isolated incident," Lord wrote. "The attackers were extremely sophisticated, and we believe other companies and organizations have also been recently similarly attacked."
"For that reason we felt that it was important to publicize this attack while we still gather information, and we are helping government and federal law enforcement in their effort to find and prosecute these attackers to make the Internet safer for all users," he continued.
The company did not make it clear how the hackers got access to the encrypted passwords but it is said to have reset the passwords which have been attacked.
The users have been notified about the security breach through emails. It is also reported that Twitter has asked the users to change their passwords in order to prevent any kind of malice. The users have been reportedly requested to create strong passwords and "avoid using websites or services that promise to get you lots of followers."