The cause of a Pine Nut wildfire that cost more than $1 million to fight may never be known.
East Fork Fire District Investigator Capt. Terry Taylor said leads have been exhausted in determining the cause of the Carter Springs fire.
He said Tuesday the fire was accidental, but there were two equally possible sources for the blaze.
The fire National Interagency Coordination Center reported Tuesday morning that the 3,454-acre fire cost $1.1 million to fight so far.
At one point, nearly 300 firefighters were battling the blaze with the help of 10 air tankers.
Taylor said investigators were able …