UPDATE: U.S. Forest Service Has Mt. Baldy Fire Contained

7:11 p.m. - As of about 5 p.m., the U.S Forest Service had the wildfire near Mt. Baldy from about 75 to 100 percent contained, a spokesperson on scene said.

Nathan Judy of the U.S.F.S said fires in the area of Mt. Baldy happen frequently and are usually put out quickly.

Judy also said the investigation of what started the fire could take anywhere from "a couple of days to a couple of months."

4:55 p.m. - The Los Angles County Fire Department is fighting a wildfire that has burned about three to seven acres near the the intersection of Mt. Baldy and Shinn Roads, officials say.

U.S. Forest Service members are also helping combat the blaze, and the Claremont Fire Department has dispatched multiple units.

More that 20 units from L.A. County Fire are responding to the area. CHP has blocked off both Mt. Baldy and Shinn.

Fire units were first dispatched to the area at 3:52 p.m., with the first unit responding on scene at 3:57.