Official Twitter feeds belonging to Barack Obama’s campaign, Fox News and Britney Spears were hijacked to send out fake messages on Monday, two days after a password-stealing phishing attack targeted the microblogging service.

“A number of high-profile Twitter accounts were compromised this morning, and fake/spam updates were sent on their behalf,” the company acknowledged on its website Monday. “We have identified the cause and blocked it. We are working to restore compromised accounts.”

A fake message sent to followers of the Fox News Twitter feed announced that Fox host Bill O’Reilly “is gay,” while a message from Britney Spears’ feed made lewd comments about the singer. A tweet sent out from the Barack Obama account asked users to click on a link to take a survey about Obama and be eligible to win $500 in gasoline.

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