(Pittsylvania County, Va.) — Investigators say someone set a half-million dollar piece of equipment on fire at a Mountain Valley Pipeline construction site in Pittsylvania County.

A passerby spotted the smoke and flames about 11 p.m. Saturday and called 911.

Sheriff’s deputies responded and found a vehicle on fire in the 2900 block of Grassland Drive in the Smith Mountain community. The equipment was located on the site of the Mountain Valley Pipeline construction right-of-way. The Caterpillar PL 87 sustained approximately $500,000 in damage.

The fire marshal determined that the fire was set intentionally. No other equipment was damaged.

The Pittsylvania County Sheriff’s Office is assisting the fire marshal in the investigation. Anyone with information is asked to call the sheriff’s department. Callers may be eligible for a reward.