(CNN) – The Secret Service is apologizing Wednesday after an employee's personal dislike for Fox News landed in an official tweet.
The message, posted Wednesday on the @SecretService Twitter account read, "Had to monitor Fox for a story. Can't. Deal. With. The. Blathering."
According to the agency, the tweet was "immediately removed" and an "internal follow-up" is underway.
"An employee with access to the Secret Service's Twitter account, who mistakenly believed they were on their personal account, posted an unapproved and inappropriate tweet," read a statement from the U.S. Secret Service. "We apologize for this mistake, and the user no longer has access to our official account. Policies and practices which would have prevented this were not followed and will be reinforced for all account users."
The Secret Service newly joined Twitter with its first official tweet from @SecretService on May 9, 2011.