Social media giant Twitter announced a security breach in user data sometime this week.
According to a blog post written by Bob Lord, the company's director of information security, a live attack was discovered and shut down, but not before the attackers managed to access limited user information for approximately 250,000 users.
Lord stated that the attack was well orchestrated and "not the work of amateurs."
"The attackers were extremely sophisticated, and we believe other companies and organizations have also been recently similarly attacked," said Lord. "For that reason we felt that it was important to publicize this attack while we still gather information..."
A small percentage of the social media website users were affected by the breach, however Lord is asking all users to make sure that their passwords are strong.
"As a precautionary security measure, we have reset passwords and revoked session tokens for these accounts," said Lord.
Lord said that the more characters the better and a mixture of symbols, numbers and lower/upper-case letters make strong passwords.
On Jan. 10, the U.S. Department of Homeland Security released a statement encouraging users to disable Java 7 because of vulnerabilities in the code. According to Lord, both Apple and Mozilla have disabled Java by default in their browsers.
Lord said that they are working with government and federal law enforcement to find and prosecute the security attackers.