A Butler man was fatally shot near the corner of West Cunningham Street and Wagner Avenue after he apparently stabbed another man early Friday morning, authorities said.

Adam Selfridge, 37, was pronounced dead at the scene at 2:40 a.m., said Butler County Deputy Coroner Larry Barr.

An autopsy was conducted Friday afternoon. The autopsy confirmed that Selfridge suffered one bullet wound to the chest, Barr said, and that the wound was the cause of Selfridge's death. No other injuries were found.

Selfridge died a short distance from his upstairs apartment in a house on the 400 block of West Cunningham Street. A pocket knife was reportedly found near his body in the middle of Wagner Avenue.

He was dressed in a T-shirt, jacket and sweat pants.

About 10 minutes after the shooting and about a mile away on Zeigler Avenue, authorities said, a man called 911 to report that he had been stabbed.

He told a county dispatcher that he had been stabbed in the torso.

Police identified the stabbing victim as 35-year-old Raymond Covelli. They gave no address for him.

Butler police Chief Bob O'Neill said Friday that how Covelli arrived at the second location is still under investigation.

O'Neill said that no other assaults are believed to have occurred, but that more details will be released as the investigation unfolds. He said details about suspects, witnesses or anyone else involved in the incident would not be released at this time in the investigation.

Police said a Butler Ambulance Service crew tended to Covelli before he was taken to Butler Memorial Hospital. He was subsequently flown by medical helicopter to an unknown Pittsburgh hospital.

The extent of his injuries and his condition were not available.

Covelli later that morning underwent surgery, said Butler County District Attorney Richard Goldinger. Investigators did not speak to him before he was taken to the hospital.

Hours following the shooting, authorities had not yet nailed down a motive.

In 2003, Selfridge pleaded guilty to attempted robbery, and in 2004 he pleaded guilty to simple assault.

Goldinger said he did not know if anyone else saw the deadly clash or if someone drove Covelli to Zeigler Avenue following the shooting and stabbing.

The knife believed to have been used in the stabbing was recovered, but the gun has not, Goldinger said.