Fire crews are working to determine what sparked an overnight house fire after people inside reported hearing an explosion in their garage.

Residents of a home on Greenbriar Drive called firefighters early Wednesday morning after the blast, and flames spread through parts of the house moments later.

Fire officials said three people inside made it out safely but are being treated for smoke inhalation.

Investigators are still working to determine what caused the explosion and fire.

Authorities said updates will be released as more information becomes available.