STAR, Idaho -- A fire that broke out at a construction site in Star overnight badly damaged three semi trucks.
Firefighters with the Star, Eagle, and Meridian fire departments responded to reports of explosions near State Highway 44 and Seneca Springs Way around midnight.
Star Fire Captain Chris Head told KTVB crews initially feared their trucks and other equipment could be damaged by the intense heat from the fire.
Upon arrival, we stayed far enough away that our apparatuses wouldn't be involved or take any of the heat or anything, Head said.
When firefighters arrived on scene, they saw two trucks engulfed in flames.
Some residents that live here in the Heron River subdivision heard two explosions, said Star Police Chief John Laraway.
Crews worked quickly to keep the fire from spreading.
Laraway says the 17 trucks parked here belong to Idaho Sand and Gravel. The company is building ponds south of the subdivision.
After securing the area with caution tape overnight, arson investigators from the Ada County Sheriff's Office were called in to try and determine a cause.
It's a lot easier to take care of the business now when we have everything secure and we have the people and resources to do it, said Laraway.
After a few hours, investigators found no evidence of arson.
Instead, pointing to an electrical issue in one of the truck's cabs.
Detectives are still working with Idaho Sand and Gravel as the investigation continues.
No one was injured.
An employee at Idaho Sand and Gravel estimates the fire caused more than a half a million dollars in damage.