A hacker going by the name of "Hacker Croll" has apparently gained access to an administrator account at the micro-blogging service Twitter.
Posting on a French online discussion forum, Hacker Croll claimed to have hacked into the account of Jason Goldman, one of Twitter's directors of product management. To back up the claims, he or she posted 13 screenshots of Twitter's account management interface.
The screenshots suggest that the hacker was able to access the accounts of several celebrity Twitter users, including those of the singer Britney Spears and the actor Ashton Kutcher.
Late on Thursday evening, Twitter co-founder Biz Stone made the following statement on the site's official blog.
"This week, unauthorized access to Twitter was gained by an outside party. Our initial security reviews and investigations indicate that no account information was altered or removed in any way. However, we discovered that 10 individual accounts were viewed during this unauthorized access."