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PARK COUNTY, COLO. -- Pike National Forest officials said a 70-acre wildfire that began over the weekend was human-caused, though they don't exactly know how it started yet.

Late Tuesday officials confirmed the fire did not start naturally.

The Weber Fire, which began about three miles north of Wilkerson Pass west of Lake George, Colo. grew to 70 acres Monday but was fully contained by 3:30 p.m. Tuesday.

About 50 of the 70 acres burned on U.S. National Forest Service land, while 20 burned on private land.

There were 70 firefighters assigned to the fire Tuesday, but that number will be reduced Wednesday.

Officials haven't determined if the human-caused fire was intentional or accidental but said charges are possible.