HAYS, Kan. -

Update: The fire chief in Hays says investigators may never know what sparked a house fire Monday morning. 

Chief Gary Brown says the most probable cause was likely accidental, but they can't determine specifically what happened.

The fire originated in the attached garage and spread into the attic of the house and to a vehicle outside in the driveway.

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The Hays Fire Chief credits smoke detectors for saving residents in a house that caught fire early Monday morning.

Crews were called to the home in the 3500 block of Fairway Drive at around 3:30 Monday morning. When they got there, they found fire in an attached garage of the large single-family home. That fire was spreading into the attic and living areas of the home.

Fire Chief Gary Brown says two people inside the home were awakened by the smoke alarm and were out of the home before firefighters arrived. They were taken to the Hays Medical Center, though the extent of their injuries is not known.

A vehicle in the driveway also caught fire.

Crews were concerned about the fire spreading to other properties because of the high wind.

A total of 22 City of Hays firefighters staffing five fire trucks and four Ellis County Rural firefighters staffing one fire truck responded. Three hose lines were needed to control the fire.

The building suffered heavy fire damage.

Chief Brown says a team of investigators from the City of Hays Police Department, City of Hays Fire Department and the Kansas State Fire Marshal’s Office are working to determine the cause.