Popular game streaming site Twitch has been hacked.
The Amazon owned streaming service posted an update on its site, warning users that there had been unauthorized access to some accounts.
Potentially affected users were contacted via email and advised to take action.
Hackers may have had access to a user's Twitch username, associated email address, password (which was cryptographically protected,) the last IP address used to log-in, first name, last name, phone number, address and date of birth.
This is not the first time the site has come under attack. In August 2014, when Amazon bought the site for $970m, the hacker group Lizard Squad preformed a denial of service attack on the site in response, but not user information was accessed.
In emails sent to affected users, Twitch stated:
"For your protection, we have expired your password and stream keys. In addition, if you had connected your account to Twitter or YouTube, we have terminated this connection."
Users will be prompted to create a new password when they next attempt to log-in and are advised to change passwords for other sites that use the same or similar password.
Twitch have yet to comment on how many users were possibly affected.