Three people were killed and another was wounded when someone opened fire in a manufacturing facility in western Maryland, and a state trooper was injured in a shootout with the suspect Thursday afternoon.

Deputies responded to an active shooting at Columbia Machine, Inc. on Bikle Road in Smithsburg around 2:30 p.m.

Three people there were killed and another was in critical condition; authorities had initially said four people were injured. There was no information immediately available on the victims' identities or whether they were employees.

A short time after the shooting, about five or so miles south of the plant, a Maryland state trooper got into a shootout with the suspect on Mapleville Road, the Washington County Sheriff's Office said. 

The trooper suffered a minor injury and the suspect was also injured and taken to a hospital. His condition is unclear at this time.

Sgt. Carly Hose, a spokesperson for the Washington County Sheriff's Office, said she was not yet able to release the name or age of the suspect, but said the suspect is male. She did not have information on what type of gun the suspect had.

Chopper4 video of the aftermath of the second crime scene shows a red four-door car pinned in by a burgundy SUV on Mapleville Road, near the Mt. Aetna traffic circle.

On the ground outside the driver's side door of the red car, police put an evidence marker next to a gun.

Smithsburg is in a remote area near the Maryland-Pennsylvania border a few miles from Hagerstown, Maryland, and about 75 miles west of Baltimore.

No further information was immediately available.

The investigation is ongoing, Hose said. The Washington County Sheriff’s Office is handling the original scene, and Maryland State Police is handling the second scene.