Updated 19 July 2018 10:52 AM EDT
CHAMBERSBURG, Pa. – A small explosion Thursday in a vehicle shop in an army depot injured four workers and left at least three burned, officials said. The blast occurred at 7:20 am in the Letterkenny Army Depot.
Army officers quickly discovered in social media that the explosion had been contained, that operations at the base were not affected, and that there was no suspicion of terrorist activity. Col. Stephen Ledbetter, the depot commander, said three victims had been flown to Baltimore hospitals and the fourth had landed in an ambulance.
A fire station said three had burns. The three victims, who were flown to Baltimore, were in serious condition, said Ledbetter.
He said the explosion occurred in the paint shop of a vehicle shop. The subsequent fire was contained.
Both the army and the labor protection authority will investigate, he said.
The depot, located 1
© 2018 CBS Interactive Inc. All Rights Reserved. This material may not be published, transmitted, rewritten or redistributed. The Associated Press contributed to this report.