Officers found a man dead and another critically wounded after hearing gunfire Monday evening in the Back of the Yards neighborhood on the South Side.

The men, ages 19 and 20, were standing in an alley about 5:40 p.m. in the 1400 block of West Garfield when a vehicle pulled up and the people inside fired shots that struck the younger man multiple times in his body and the older man in his chest and leg, the according to Chicago Police. Officers heard the gunfire and found the men suffering from their wounds.

The younger man was pronounced dead at the scene, while the older man was taken to Stroger Hospital in critical condition, police said.

The Cook County Medical Examiner’s Office didn’t immediately confirm the death.

The circumstances of the shooting weren’t immediately known.

Area South detectives were investigating.