DOUGLAS COUNTY, Colo. (CBS4) — A fire that broke out at a construction site engulfed four separate wood frame buildings — and the flames spread to some brush to the south, along the High Line Canal. The cause of the fire has been ruled accidental.

South Metro Fire Rescue fought the flames on Monday afternoon, at Riverscape Court and Channel Drive in Unincorporated Douglas County.

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(credit: South Metro Fire)

South Metro said two people were burned and have been transported to the hospital. They are in stable condition.

“Crews are gaining control of the brush fire behind the structures. Firefighters are also making progress on the buildings,” South Metro tweeted.

(credit: CBS)

“Both master streams are operating from Tower 18 and Ladder 12 to spray water from above,” officials stated.

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(credit: CBS)

(credit: CBS)

The fire was under control by about 4:45 p.m. Fire crews returned to the scene just after 9 p.m. because winds were blowing embers into the treetops along the High Line Canal.

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South Metro Fire said it was an accidental fire due to use of flammable liquids at the construction site.