A Washington DC firefighter is on administrative leave after a viral social media video shows him punch an usher at Nationals Park during Tuesday night's game between the Nationals and the Atlanta Braves.

Metropolitan police identified the man as 54-year-old Christopher Sullivan, of West Virginia. He was arrested and charged with assault after video shows him yelling obscenities and then punching an usher who was trying to escort him out of the park.

The fight began when an usher asked Sullivan, who was sitting in a section he didn't have a ticket for, to return to the seat on his ticket. 

Sullivan was reportedly asked to return to his seat multiple times before he was eventually told he had to leave.

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Spectators in the video can be heard yelling "get out of here, dude" and "you've gotta go."

The usher was using his body to force Sullivan up the stairs and out of the section when Sullivan turned around and punched the man in the face, prompting a response from police and security at the ballpark.

The Washington Nationals ballpark

A general view of Nationals Park in Washington, D.C. prior to the Atlanta Braves versus the Washington Nationals on Sept. 27, 2022. (Mark Goldman/Icon Sportswire via Getty Images)

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Sullivan is a firefighter with DC Fire and EMS, but was already on administrative leave with pay for an incident that occurred on Aug. 31, Fox 5 DC reported.

The outlet received the following statement from the department:

"The actions witnessed in the video are absolutely unacceptable. Our department was notified on September 27, 2022, that an employee of our agency had been arrested and charged with simple assault by Metropolitan Police. Prior to this incident, the individual was on administrative leave with pay, pending the outcome of an internal personnel process. He will remain on leave as our internal investigation into this matter continues."

Man punches another man in stands at baseball park

Washington DC firefighter Christopher Sullivan, who is on administrative leave, is seen punching an usher at Nationals Park in the face while being escorted out of the park. (@ThomasGinn34/Twitter via Fox 5 DC)

Sullivan was reportedly fired from the department "several years ago," but was then reinstated, according to NBC Washington.

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The Nationals banned Sullivan from the ballpark for five years following the incident.