Three propane delivery trucks were damaged by fire early Saturday morning.
Frederick County Fire and Rescue says 25 fire fighters were dispatched at around 1:00 AM to the supply yard of Amerigas in the 1500 block of Tilco Drive, and found the cabs of the three trucks well involved in fire. Propane was stored on board the trucks.
Personnel initiated a plan to protect other delivery trucks and nearby propane storage tanks from catching fire. That helped keep the flames was spreading.
Damage is estimated at $600,000.
The Frederick County Fire Marshal's office is investigating the cause of the fire.