Crews are on the scene of an explosion at Letterkenny Army Depot.
According to Col. Steven Ledbetter, the commander at Letterkenny, a small explosion and fire in the paint area of Building 350 left four people requiring medical assistance.
Three victims were taken to a Maryland hospital via a medivac in serious condition, and another was taken to Chambersburg Hospital in unknown condition.
Ledbetter said that the next update will come at 1 p.m. on Thursday.
Letterkenny Army Depot had posted several messages on their Facebook page this morning with different warnings and updates for employees, but removed them around 9:15 a.m.