A man fatally shot three of his fellow workers at a rural Maryland manufacturing facility Thursday before being injured in an exchange of gunfire with state troopers, authorities said.
Three employees of Columbia Machine, Inc., in Smithsburg, were killed and a fourth was injured, Washington County sheriff's officials said. A law enforcement official who first confirmed the deaths also initially said four people had been injured in the attack.
A Maryland state trooper who exchanged gunfire with the suspected shooter on a road near the attack suffered a minor injury, and the suspect was captured alive, the law enforcement official said.
Washington County Sheriff Douglas Mullendore identified the three killed as Mark Alan Frey, 50; Charles Edward Minnick Jr., 31; and Joshua Robert Wallace, 30.
A 42-year-old worker was injured, the sheriff said.
The suspect, identified only as a 23-year-old man who lives in West Virginia, was in custody at a hospital, Mullendore said. As of Friday, the suspect remained under police guard there, The Associated Press reported.
His name was being withheld pending potential charges, the sheriff said. The weapon used was a semiautomatic handgun, he said.
The shooter fled in a vehicle before authorities arrived, but he was confronted on Maryland Route 66, authorities said.
Aerial video from NBC Washington showed the location where troopers and the suspect clashed — a roadway with a Mitsubishi Eclipse and an unmarked police SUV.
The roadway was littered with evidence markers.
Maryland State Police Lt. Col. Bill Dofflemyer said at the evening news conference that three troopers en route to the scene encountered a motorist who matched the suspect's description.
That suspect immediately opened fire, he said, prompting troopers to return fire and injure the man.
The shot trooper, identified as a 25-year veteran of Maryland State Police, was treated and released late Thursday, MSP said in a news release.
The FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives were assisting local investigators, sheriff's officials said.
The area of the attack is about 8 miles east of Camp David, the presidential retreat. There is no indication the violence was related to the retreat.
The incident, which took place about 2:30 p.m., was initially considered an active shooter situation.
CORRECTION (June 10, 2022, 3:21 p.m. ET): A previous version of this article misspelled the last name of one of three people fatally shot at a Maryland manufacturing facility. He is Mark Alan Frey, not Frye.