BEND, Ore. - Over 1,000 people are working to corral the Two Bulls Fire and bring it under control.
Three days after the fire started to fill the sky over Bend with smoke, fire managers estimate containment at 25 percent.
But crews had finished fire line around the remaining unsecured portions of the 6,800-acre fire.
Managers predict crews will be mopping up the fire by the end of the week.
Investigators now say the fire was caused by human activity. They've gathered evidence at the ignition point, and a $2,000 reward is being offered for information leading to a conviction.
Through Tuesday, no homes were lost, although 50 remained evacuated and hundreds more are on notice to be ready to leave. A third of the structure fire units mobilized from around the state have been released from the fire as the danger to homes lessened.
The watershed from which Bend draws its drinking water remained untouched by the fire.
Estimated cost to date for suppressing the fire had reached $2.4 million by Tuesday morning.