NC man dies a day after killing 3 co-workers

Authorities say the man who shot and killed three co-workers at a North Carolina lumber company has died of a self-inflicted wound.

Montgomery County Sheriff Dempsey Owens said in a news release that 50-year-old Ronald Dean Davis of Star died Saturday morning at UNC Hospitals in Chapel Hill from a single gunshot wound to the head.

Authorities haven't released the names of the victims of the shootings at McBride Lumber Company. A fourth victim was critically wounded.

They have said Davis went home after the rampage at the warehouse and shot himself. Owens said Davis was described as disgruntled, but the sheriff didn't say exactly why he was upset. He said Davis targeted his victims at the company, where 16 people were working when the shooting occurred early Friday.