Firefighters investigating Selma house fire

SELMA, Calif. (KFSN) -- Arson investigators are working to determine what sparked a fire at a home in Selma on Wednesday morning.

The fire was first reported just after 4 am on O'Ryan Street near Mitchell Avenue.

Officials said the fire started in a back patio area of the house, then spread to a built-on living area.

Crews were able to keep the fire in that added room but said the flames caused significant damage.

The room did not have a working smoke detector, investigators said, and neighbors had to alert them.

A woman escaped through a window before firefighters arrived on scene.

No one was hurt.