Twitter has confirmed that someone broke into its network and gained access to 10 accounts, which appear to include Britney Spears and Ashton Kutcher, according to screenshots posted on a French blog site.

“Our initial security reviews and investigations indicate that no account information was altered or removed in any way,” Twitter co-founder Biz Stone wrote in a blog post Thursday afternoon.

“Personal information that may have been viewed on these 10 individual accounts includes email address, mobile phone number (if one was associated with the account), and the list of accounts blocked by that user,” the posting said. “Password information was not revealed or altered, nor were personal messages (direct messages) viewed.”

Stone did not respond to an e-mail seeking comment.