Update 3:42 p.m.
Sheriff Mike Linder said the shooter was not arrested because he cooperated with the investigation and was protecting himself at his home.
Investigators will forward the report to Yellowstone County Attorney Scott Twito's office, which will determine whether to file formal charges.
Linder declined to identify either man and said he had no information on the condition of the man who was shot.
Watch police at the scene here:
(initial report) Yellowstone County deputies are investigating a Wednesday morning shooting west of Billings.
Sheriff Mike Linder said in a news release that the shooting was reported at 11 a.m. at the 7400 block of Burlington Avenue and involved two men.
The victim was conscious and talking to responders before he was taken to a hospital, Linder said.
The suspected shooter is cooperating with authorities.
Linder said authorities believe the shooting was limited to the two men involved, and others in the area are not in danger.
