"Anyone with information that could help identify the suspects is asked to contact the Crime Stoppers Tip Line at 1-877-876-TIPS.
"You can remain anonymous, and you could be eligible for a cash reward."
A form for tips also can be found KTVZ.COM's Crime Stoppers page.
Bend-La Pine school officials said Tuesday the reduced level of threat to Bend's Westside meant classes will resume Wednesday at three Westside schools - Miller Elementary, Cascade Middle School and Summit High School.
The fire lines held at 6,800 acres Monday, and while no structures have burned, one firefighter sustained a minor cut to a leg, Here's the other details in the 6:30 p.m. update:
"Good progress was made on the east flank of the fire. Crews have most of that side complete with hose lines and lots of mop up continues with the advancement of the hose lays.
"Line construction on the west flank of the fire continues and is progressing well. Helicopters assigned to the fire are supporting that line construction operation.
"A considerable amount of smoke was visible from the fire with the increased winds that developed in the afternoon with the arrival of an upper level weather disturbance over the fire.
"Structure protection task forces mobilized under the Conflagration Act continue their work around the structures and mitigation plans are in place, should the fire jump containment lines."
By Monday morning, the first containment figure came -- 5 percent -- with still no structures lost or damaged and no injuries -- and by day's end, that was boosted to 25 percent. The acreage of 6,800 acres equals about 10.6 square miles.
The firefighting army has grown to more than 800, officials said late Monday, and so has the price tag for battling the blaze -- now at $2.2 million.
Crews on hand Monday employed 11 helicopters, 46 engines and 11 bulldozers; air tankers were on standby.
Firefighters took advantage of some calmer weather Sunday to make good progress securing fire line around the eastern and southern portions of the fire.
Some crews from the east flank divisions on the fire were shifted to the western side Monday to help secure fire line there.
Structure protection task forces mobilized from across the state under the Conflagration Act continued to work around threatened homes and have contingency plans in place to help protect the Bend watershed facilities, should the fire jump containment lines.
Sheriff's Capt. Shane Nelson said late Sunday the evacuation alert for 200 homes in Saddleback was being dropped from Level 3 to Level 2 -- in which residents are told to "prepare to leave at a moment's notice. But the ability to return was only for residents, as proof of residency still will be required at roadblocks, he said..
As deputies continued to patrol the area, Nelson said they "highly recommend residents continue to avoid the area. However, if they choose to return, we recommend they leave their livestock where it is boarded." They also are urged to be "very cautious" due to firefighters working in the area.
Level 1 and 2 evacuation notices are still in effect, Nelson said, with the Level 2 notice -- be "set" to leave at a moment's notice -- in place for homes south of Shevlin Park Road, west of Mt. Washington Drive and north of Century Drive.
The lowest, Level 1 notice -- urging residents to get "ready" and take precautions -- is for areas of NorthWest Crossing east of Mt. Washington Drive, as well as residents north of Shevlin Park and west of Mt. Washington Drive. Level
A Level 3 evacuation alert -- to "go" and leave -- remained in effect for residents of about 50 homes near Skyliners Road west of Bend.
A Red Cross emergency shelter, set up over the weekend, was closed Monday at High Desert Middle School on SE 27th Street in Bend, but officials said they would monitor the situation and reopen it or take other steps as needed.
A fire information line is at (541) 550-4850.
The unified command overseeing the Two Bulls Fire created a Facebook page Sunday, at https://www.facebook.com/TwoBullsFire -- as well as a Twitter feed to follow @TwoBullsFire.
An InciWeb page also has been created at http://inciweb.nwcg.gov/incident/3889/ which updates will be posted: new updates were posted late Sunday.
Most of the fire activity Sunday was in the northwest corner of the fire, burning in predominately brush and timber, officials said.
NewsChannel 21's Matt McDonald, reporting live Sunday evening from the Skyliners Road roadblock, said COIDC dispatchers told him the tall dark plume of smoke was coming primarily from burning of unburned fuels within the fire's perimeter, and not from growth on the edges.
The city of Bend shut down its surface-water pipeline late Saturday, moving to only groundwater wells due to that threat while urging residents to conserve water.
The fire is under the command of the Oregon Department of Forestry, with city and county officials working with them.
The park district has closed Shevlin Park and advises residents to avoid Skyline Park – the ball park near Cascades Middle School. Tumalo State Park's day-use area was closed, though the campground remained open.
To help the operation, agencies also ask that Bend area residents avoid the Skyliners Road and Shevlin Park Road and western Mt. Washington Drive areas. Recreational trails in the Phil’s Trail area also should be avoided.
The two smoke columns first were spotted during the noon hour Saturday -- a lookout atop Black Butte called in the two plumes at 12:48 a.m., though some residents said they saw smoke in that area as much as an hour earlier.
They broke out in an area due west of Tumalo Reservoir, near where the east-west Bull Flat Road ends at the north-south Brooks-Scanlon Logging Road (Forest Service Road 4606). The two fires quickly spread south, fanned by strong winds through the afternoon and evening.
A Type III incident management team handed off at noon Sunday to an Oregon Department of Forestry Type II incident management team.
A Level 2 notice warns of "a good probability that hazards associated with the approaching fire will severely limit our ability to provide emergency service protection."
"You must prepare to leave at a moment's notice," the advisory states, adding that first responders are working on information about when to leave and what routes to take.
Also issued was a Level 1 notice, for residents in the rest of Northwest Crossing (east of Mt. Washington Drive), and the area that includes residents north of Shevlin Park and west of Mt. Washington Drive.
In that area, residents were warned "that current or projected threats from hazards associated with the approaching fire are severe," and that "this is the time for preparation and precautionary movement of persons with special needs, mobile property and (under certain circumstances) pets and livestock.
A Level 3 evacuation notice warns of "immediate threats to the life and safety of persons within this area."
"If you choose to ignore this advisement, you must understand that emergency services may not be available," the notice said. "Volunteers will not be allowed to enter the area to provide assistance."
Along with numerous Forest Service road and area closures -- 4606, 1610, the Skyline Forest, 4601, 4603 and Tumalo Falls --the sheriff's office said several roads on Bend's Westside were closed, including sections of Shevlin Park, Tumalo Reservoir, Sisemore, Tyler, Skyliners and Johnson roads.
Sunday's planned Dirty Half half-marathon near Phil's Trail west of Bend was canceled due to the fire so close by, race officials said.
Around 6:45 p.m. Saturday came word that the fire kept burning toward the south and southwest, and sheriff's volunteers were evacuating residents on Skyliners Road, about seven miles west of Bend.
Search and Rescue crews went door to door, logging which residents were home, and who was agreeing to leave - and who was not.