For the third time this week, in a third borough, a city police officer has shot a suspect, the NYPD said.

The latest shooting occurred just after 4 a.m. Friday, when a sergeant, assigned to a 70th Precinct anti-crime patrol, encountered a suspect with a knife while investigating a theft of tires from a car on East 19th Street in Brooklyn, police said.

The sergeant, who was not identified, fired once -- striking the suspect.

The suspect then fled; as of 11:15 a.m., he had not been apprehended, police said.

One of the two prior police shootings took place Tuesday night in East Harlem. The other took place during a domestic dispute in the Bronx on Wednesday. In that case, a man was shot and killed. In each shooting, the suspect had pointed a gun at police, officials said.

Police said the incident Friday began when the sergeant, on plainclothes patrol in an unmarked car, encountered two men stealing tires from a 2015 Honda Fit on East 19th near Glenwood Road in Flatbush. When the sergeant went to investigate, police said, the suspects fled in two waiting vehicles.

The sergeant then notified two plainclothes officers of the direction in which the suspects fled. With the sergeant still at the initial scene, another vehicle, with two suspects inside, came to the location to retrieve items -- and when the sergeant identified himself, the two men tried to flee, police said.

Their vehicle struck a parked car, police said. When the sergeant attempted to "engage" the suspects in a subsequent stop, police said, the two men ignored "multiple orders" to remain in the auto and one of the suspects menaced the officer with a knife. After that suspect ignored "multiple orders" to drop the weapon, police said, the sergeant fired a single shot, which apparently struck the suspect.

The suspect then fled.

A 26-year-old passenger in the car was arrested. He was not injured, police said. Charges are pending.

The sergeant was taken to Kings County Hospital for treatment of tinnitus.