Investigators are searching for the cause of a fire that quickly destroyed an ambulance near Harrisburg on Monday.

The ambulance, belonging to the Exeter Ambulance Association in Berks County, was returning from being serviced in Cumberland County when it went up in flames in Lemoyne around 4:30 p.m., according to Jon Herbsleb, the ambulance association's chief of operations.

The flames erupted in the cab area of the ambulance and quickly spread to the rest of the vehicle, Herbsleb said.

"No crew was hurt nor was there a patient involved," Herbsleb said.

Investigators have not yet determined what sparked the fire, but Herbsleb said he believes the cause may be electrical in nature.

Exeter operates four ambulances, which undergo extensive preventive maintenance every 4,000 miles, according to the association's website.