A uniformed New York City police officer shot and killed an unarmed man on Tuesday after a car chase that began in the Bronx ended with a foot pursuit and a confrontation in a wooded area of Yonkers just off the Saw Mill River Parkway, the authorities said.

A law enforcement official identified the fatally wounded man as Miguel Espinal, 36, who a relative said had been driving his father’s car on Tuesday.

“No weapon has been recovered,” said Stephen Davis, the chief spokesman for the New York Police Department, who added that the circumstances that led to the shooting remained under investigation.

The police chase began shortly before noon, when two officers from the 50th Precinct in the Bronx, on patrol in a marked car, saw a gray 2009 Nissan Z driving erratically and began to follow it. The officers tried to pull the car over at 242nd Street and Broadway; instead it was driven off at high speed, officials said. The officers followed the car but lost sight of it on the parkway, just over the border in Westchester County.