An employee of a Jeep production plant in Toledo shot three co-workers, one fatally, before killing himself, police said.
Police said the shooter walked into the plant with a double-barrel shotgun, yelling and demanding that some of the body shop's supervisors come to the office area.
The shooting happened about 8:45 p.m., Police Chief Mike Navarre said. Navarre did not release the victims' names. The gunman, identified as Myles Meyers, 54, of Toledo, shot himself in the head, police said.
Mary Beth Halprin, a spokeswoman for DaimlerChrysler, Jeep's parent company, said Meyers had been disciplined recently for a minor infraction.