NEW HAVEN — A city police officer was recently arrested after allegedly assaulting a man at a Fairfield bar.

Esau Ramirez, 30, of Stratford, was arrested after being involved in a physical altercation at Geronimo’s Tequila Bar in Fairfield Sunday evening, Fairfield Police Chief Christopher Lyddy said Friday.

The New Haven Independent first reported his arrest.

He was charged with third-degree assault and released on a promise to appear, Lyddy said.

The other man involved in the altercation, a 24-year-old man, was evaluated by medical responders for an eye injury, but declined to go to the hospital, Lyddy said. He told police he had recently had surgery in that area of his head, and police saw a visible welt that was “red and puffy,” according to the incident report.

Ramirez told police the 24-year-old man pushed him first. However, surveillance video shows Ramirez jump up and grab the victim, striking him in the face several times, police said in the incident report.

The two parties then separated, and moments later Ramirez walked across the bar to where the victim was, but friends were able to separate the two without further incident, police said. Ramirez was waiting outside when police arrived.

Ramirez is scheduled to be arraigned in Superior Court in Bridgeport April 26, according to judicial records.

Interim New Haven Police Chief Otoniel Reyes said Friday morning that Ramirez remained on active duty.

The department had learned of the incident, Reyes said, but was not aware of anything that indicated Ramirez should be placed on administrative leave at this time.

“We’re going to be monitoring the case and we’re going to be taking appropriate action as needed,” Reyes said.

Ramirez did not immediately respond to a message seeking comment Friday.

Reporter Humberto Juarez contributed to this article.