A 73-year-old man was found shot to death more than two hours after he opened fire on a sheriff’s deputy in northwestern Minnesota, authorities said.

The state Bureau of Criminal Apprehension identified the man late Tuesday as Clarence Duane Huderle, of Warren, Minn.

According to the BCA, Huderle died of a gunshot wound, according to the Grand Forks County medical examiner’s officer, which is still investigating his death.

The incident started about 11:20 a.m. Monday in Northland Township, roughly 12 miles north of East Grand Forks, near 160th Street and 410th Avenue NW.

A mail carrier called authorities and reported that he heard two gunshots and had the rear window of his vehicle shot out while on his route.

A sheriff’s deputy arrived at the scene and was confronted by Huderle, who was armed with a high-powered rifle.

The deputy called for help, and other law enforcement agencies responded.

Huderle shot at the deputy, and the round hit the squad vehicle.

According to a preliminary investigation, one officer fired during the incident. The officer, a member of the Pine to Prairie Drug Task Force, gave a statement to authorities. The officer “is not being named because he works in an undercover capacity,” the BCA said

Shortly before 2 p.m., the man was found dead outside his home with the rifle.

The BCA will turn the findings over to the Polk County attorney’s office for review.