OAKLAND — Two juveniles are charged with starting a fire at the site of the former Cascade Woolen Mill on Friday.

Police and fire crews were called to Cascade Mill Road at around 3:40 p.m. for a report of smoke coming out of one building on the site. The mill building burned in January 2010, but several smaller buildings remain, including the tall building the smoke was seen coming from.

The person who called in the fire reported seeing children running away from the area after the smoke started, according to Oakland Police Captain Rick Stubbert.

The area isn’t fenced off or secured, but police patrol it, Stubbert said.

Firefighters found a fire smoldering in a 55-gallon drum in one building and extinguished it. Although the fire was continued to the barrel, it could have spread to other parts of the building, Stubbert said.

“There were other flammable things in there,” he said. “We were lucky to catch it early.”

Two boys riding bicycles were stopped by Sgt. Tracey Frost and charged with arson, Stubbert said. He did not know the ages of the boys but they are believed to be from Oakland, Stubbert said.

Arson is a Class A crime in Maine, a serious felony.

This is the second case of arson at the former mill since the main building burned. A 14-year-old boy from Oakland was charged with arson in 2013 after allegedly setting fire in a building that used to house the mill’s boiler room.