Fire crews are fighting a fire at a condo complex north of Denver.
The fire was burning in at least two three-story buildings in Thornton Tuesday.
At least eight families have been displaced. The Red Cross is helping them find a place to stay.
Two adults who were hurt were contract workers working in the apartments. The extent of their injuries haven’t been released.
A spokeswoman for the North Washington Fire Protection District, Sandy Danne, said one building has been damaged on all three floors, while the second has suffered less damage.
Helicopter video showed a large plume of smoke coming from the buildings, which are very close to others in the complex. The roof of one building collapsed.
According to the Aurora Fire Department, gas vapors caused a flash fire and explosion, but it’s not clear how it ignited.