The doctor was identified as George Seese, 59, who received his undergraduate degree from Youngstown State University in 1980.
Police Chief Keith Moser told CBS affiliate WOIO-TV that Dr. George Seese was leaving Affinity Medical Center and getting into his vehicle in the afternoon when a man, later identified as 50-year-old Michael Wood, approached him in the parking lot and opened fire with a handgun at close range.
Seese, 59, was fatally wounded and the gunman, later identified as 50-year-old Michael Wood, shot himself at his auto, which was parked behind Seese's vehicle.
An Ohio doctor has been killed in an apparent murder-suicide in a hospital parking lot. Both men were rushed inside the hospital where they were later pronounced dead, according to the news station.
Still, the hospital and nearby schools went into lockdown after the shooting.
According to the practice's website, Seese was called "Skip" by everyone who knew him.
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In addition to Affinity, he also practiced at Union Hospital in Dover, Aultman Orrville Hospital in Orrville and Aultman Hospital in Canton. He completed his cardiology fellowship at Deborah Heart and Lung Center in Brownsville, N.J., and returned to OH in 1992.
Moser told CBS that several people witnessed the shooting.
Police say at least six spent rounds were found in the parking lot.
According to police, both Seese and Wood were on the ground with gunshot wounds when officers arrived.
Authorities said the gunman shot Seese, a father of 13, up to five times before turning the weapon on himself.
A man who lives near Affinity Medical Center tells The Independent newspaper he heard about six shots Monday afternoon.