BROOKFIELD, Ill. (WLS) -- Brookfield Zoo is now apologizing after an employee posted what some may call a racist comment on social media.The employee, wearing a zoo uniform, uploaded a picture with the caption: "at work serving these rude (expletive) white people," reportedly tagging the zoo in the post.The zoo issued a statement saying it has zero tolerance for that kind of behavior and that the worker is no longer employed there.The zoo issued a statement saying:"We became aware of the actions of a single employee which we agree are unacceptable. This employee's statements in social media are in violation of our policies and do not reflect our institution's values. We have zero tolerance for these kinds of divisive behaviors. We treat all employment matters confidentially, but rest assured that we have taken prompt action to remedy the situation."We hope you continue to hold Brookfield Zoo in high regard and not let the actions of one individual overshadow the longstanding good work of the Chicago Zoological Society."