MARINETTE COUNTY, WI (WTAQ) - DNR officials continue to work on extinguishing a forest fire near Peshtigo.

Crews are working through the weekend to put out the hot spots from the blaze first reported on Thursday

Officials say the blaze has more than 100 acres in a lowland forested area north of U.S. Highway 41 and is surrounded by mineral soil fire breaks. Crews are also working to make sure the fire doesn't spread past the present charred area.

The DNR says although the fire is now contained, it continues to burn due to the dry conditions and peat soils that would normally be wet.

It's primarily smoldering underground and will continue to burn for days until it can be extinguished.

Crews are coming across periodic flare-ups within the burned area; however the fire isn't expected to spread beyond present containment lines or to be a threat to nearby homes.

DNR officials say although smoke is visible, and can be smelled throughout the Peshtigo area, there is little threat of the fire spreading further, and there is no need to call 911 to report the smell of smoke.

Motorists along Highway 41, particularly at night, may observe low hanging smoke or fog from the fire and should slow down and use caution if encountered.

The cause of the fire is still being investigated.