SEYMOUR, Ind. (AP) — A manager and a worker he supervised at a Cummins Inc. engine factory in southern Indiana were fatally shot Thursday morning in an apparent murder-suicide, authorities said.

Ward R. Edwards, 49, of Columbus was killed by Qing Chen, 37, of Seymour, Seymour police said. The two men were found dead in a meeting room on the second floor of the plant's technical center. Police recovered a 9 mm Glock handgun at the scene.

Police served search warrants on both men's vehicles and on Chen's apartment in Seymour. Autopsies are planned Friday.

Police Chief Bill Abbott said at a news conference that two to four gunshots were reported fired about 8:45 a.m. No one else was wounded in the shooting at the plant site about 60 miles south of Indianapolis.

Seymour police did not provide any other details about the shooting, but Indiana State Police Sgt. Stephen Wheeles said preliminary information indicated it was a murder-suicide.

The plant that employs hundreds of workers who make generators and engines used in trucking, farming and construction equipment, will remain closed until Monday and counselors will be available to help employees "at this very difficult time," said Jon Mills, a spokesman for Columbus-based Cummins. He declined to comment further on the shootings.

Police surrounded the plant and escorted workers outside after the shootings. Cummins worker Jan Poole said she heard a noise so loud her desk shook and she didn't realize it was gunshots.

"I thought the ceiling was coming down. I thought something was going on with the structure. And it wasn't until I was halfway out the door that someone said there was a shooting," Poole told WDRB-TV..