A Pennsylvania man is dead because his loud snoring kept waking up his fed-up neighbor, who stabbed him to death to get him to stop.

The bizarre, real-life tale began last Sunday evening in Upper Moreland Township, where police responded to the home of Christopher Casey after receiving a 911 call from him to report a stabbing.

When they arrived, the cops discovered Casey's neighbor, Robert Wallace, about 50 feet from the house with two knife wounds in his body.

Casey also had been stabbed in the right thigh. Police found blood inside and outside the residence.

Both men were rushed to a local hospital, where Wallace died, and Casey was treated for his non-life-threatening injuries.

Investigators were able to piece together that Wallace went over to Casey's home that night and stepped onto his porch to detach a screen from one of the windows.

Casey, who was eating dinner, was somehow alerted and confronted Wallace, getting into a heated argument.

During the verbal altercation, Casey produced a military-style knife, plunging the blade into Wallace twice.

It was not clear how Casey suffered his wound. Police recovered the knife at the crime scene.

Perhaps the most stunning element of the story came when detectives learned the motive behind the attack ... the neighbors had been involved in an ongoing beef over Casey's loud snoring, which could be heard through a wall shared by their connected homes.

Montgomery County District Attorney Kevin Steele said Casey was arrested Thursday and charged with Third-Degree Murder, Voluntary Manslaughter and Possessing an Instrument of Crime. Casey is currently in custody, while being held on $1 million cash bail.