FLORENCE, Ore. -- A neighborhood dispute about a pet cat escalated into a murder-suicide Friday in a rural part of Lane County, investigators believe.

Teddy W. Sellers, 63, died Saturday morning at a Eugene hospital from gunshot wounds sustained Friday night in a dispute with his neighbor, 57-year-old Guy A. Frazier.

Frazier believed Sellers had injured his cat, investigators said. Frazier confronted Sellers on the street about the incident and a shot was fired, striking Sellers in the head, according to the Lane County Sheriff's Office

The two men lived alone and next door to one another. Investigators believe the two had an ongoing dispute over trespassing, pets and other neighborhood nuisance issues.

A postal carrier saw the injured Sellers and alerted authorities. Sellers was taken by air ambulance to RiverBend Hospital in Eugene, where he died the next day from his injuries.

The sheriff's office closed down Canary Road for several hours Friday night and Saturday morning while they searched for the shooting suspect. Officers executed a search warrant at 2:15 a.m. and located Frazier's body. Investigators believe Frazier took his own life before emergency crews arrived.