NEW YORK (CBSNewYork) — An investigation is now underway after a fire truck on Long Island was photographed with a Confederate flag displayed.

A Facebook user posted a picture Sunday of a Brookhaven Fire Department truck.

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On Sunday night, the Brookhaven Fire Department released a statement saying one firefighter is responsible, and that the flag was not authorized by the department’s leadership.

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“The unauthorized action is condemned in the strongest of terms … and that disciplinary action for this matter has already commenced,” the statement read.

The department has apologized.

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