The Tucson Police Department announced Monday evening that James Alvarado, 40, was pronounced dead at the scene late Saturday north near North Oracle and East Navajo roads.

Police have not released the name of the shooter, but said he was the victim in the incident.

Police explained in a news release:

Just before 11 p.m. on March 2, officers were patrolling near the 3300 block of North Oracle when they heard several gunshots. They began searching the area and were flagged down by two men near North Stone Avenue and East Navajo Road.

One of the men, a 21-year-old man, suffered non-life-threatening gunshot wounds, and the other man, a 20-year-old man, was uninjured.

As additional officers searched the area, they found Alvarado in an alley.

Detectives said the two men who called police were in a nearby parking lot with another acquaintance when Alvarado and another man arrived and assaulted the three men.

Alvarado displayed a firearm and the three men attempted to flee, but Alvarado and the other suspect chased them into an alley. Alvarado “began assaulting one of the men, at which point one of the three victims fired a firearm, striking Alvarado,” according to a police news release. The other suspect who was with Alvarado has not yet been captured, police said. Police did not release their names.

Detectives are asking anyone with information to call 911 or 88-CRIME. “You can remain anonymous.”