A man was killed by Chicago police during a shootout Sunday evening on the city’s West Side, authorities said.

No police officers were injured in the incident in which officers and two men exchanged gunfire, police said.

Police at the scene on the 4000 block of West Lexington Street in the Lawndale neighborhood said the shooting occurred in the alley of the residential area lined with bungalows and row houses.

The shooting happened at 7:18 p.m., said Independent Police Review Authority Deputy Chief Carlos Weeden. The IPRA investigates shootings involving Chicago police officers.

Gang enforcement officers were near the scene, at Pulaski Road and Lexington Street, just before the shooting occurred, conducting a traffic stop, police said.

The officers received a report of two armed men in a nearby alley, and when police responded, the offenders opened fire on the officers, police said. The police returned fire, fatally wounding one man.

No information was available about the man who died. A second man fled the scene, police said.

Two weapons were recovered at the scene, police said.

Several blocks in the neighborhood were blocked this evening as police searched the area. A police helicopter circled the neighborhood, its spotlight shining down on the scene.

Anthony Smith, a resident of the neighborhood, said he heard 15 to 20 gunshots exchanged.

“”It was a shootout,”” he said. “”It was going back and forth.””

The Cook County medical examiner’s office was notified of a fatality from the Lexington Street address, an office spokesman said. The victim remained unidentified as of late Sunday night, the spokesman said.