SPANGLE, Wash. -

A 50 acre fire burning near Spangle, Washington is 70% contained after fire crews put in a full day of work Tuesday.

More than 100 firefighters are working to extinguish the flames and a spokesman with the Department of Natural Resources says they've dug a fire line around 95% of the fire

Five homes were threatened by the fire when it first began, but are now safe since heavy winds began blowing to the north.

Firefighters believe the fire may have been started sine one of the homes but say the cause is still unknown.

"Fire danger is still high in Spokane County, so it's going to be dry. We ask everyone to be careful out in the woods. We do have a burn ban in effect so you're not supposed to be burning anything," Bernard Jones with the DNR said.

In the early stages of the fire several airplanes were dropping flame retardant and water from above, but they ceased operations early Tuesday evening.

Crews from Fire District 3, Spokane Valley and Airway Heights are all on scene and will remain along the fire lines to watch for any flare-ups.

No injuries have been reported.