SPIRIT LAKE - Fire investigators spent Tuesday combing the site of a fire near Spirit Lake that torched 13 acres and drew firefighters from several agencies Monday night.

Wayne Nowacki, Spirit Lake fire marshal, said the fire on Inland Empire Paper property was likely human-caused, but it remains under investigation and there are no suspects.

"A lot of people come back here to ride ATVs, drink, smoke dope, camp and have romantic activities," said Wayne Nowacki, Spirit Lake Fire's fire marshal. "You name it; it probably happens. I didn't see anybody (on the property), but somebody could disappear pretty quick."

Nowacki said he hadn't found any evidence as of Tuesday morning that would point to what specifically caused the fire or where it started southeast of the intersection of Highways 41 and 54 south of Spirit Lake.

"No campfire rings or even a fresh beer can," he said. "We're just in the preliminary stages of the investigation. It may take a couple days to determine where the fire started."

Nowacki iscollaborating with an Idaho Department of Lands investigator on the investigation.

Spirit Lake fire Chief John DeBernardi said there were some structures in the vicinity of the fire, but evacuations were not needed because fire crews were stationed near them and there was no serious threat.

Part of the site was logged a few years ago and a former railroad right of way runs through it. There are multiple dirt roads on the property. The site is a combination of timber and flatland brush.

"The fire was working toward a denser area to where the houses are, but air support knocked down that eastern line so it couldn't extend in there," DeBernardi said.

Two airplanes, a helicopter and a bulldozer were used to battle the fire.

DeBernardi said the air support and calm wind conditions prevented the fire from becoming a wildfire disaster despite the perilously dry terrain.

Shane O'Shea, IDL spokesman, said conditions were similar to what they normally are in mid-July.

"All the forest fuels are extremely dry," he said.

The fire was contained around 9 p.m. on Monday. Crews remained on site throughout the night and on Tuesday, tending to hot spots and keeping an eye out for re-starts.

Those with information about the fire are encouraged to call Spirit Lake Fire at 623-5800.