UPDATE (3:34 p.m.) - The house fire that broke out Friday afternoon in Atascadero started at 5444 Hermosilla Ave. and spread to a neighboring home at 5424 Hermosilla.
According to the family at 5424 Hermosilla, the two-story structure that burned is a guest house. One of the tenants actually climbed onto the roof to fight the fire before firefighters arrived.
The cause of the fire is under investigation.
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UPDATE (1:55 p.m.) - Neighbors tell KSBY they heard an explosion before flames broke out at a home on Hermosilla Avenue Friday afternoon.
Firefighters have the flames knocked down but are expected to remain on scene for some time.
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(1:06 p.m.) - Firefighters responded to a house fire in Atascadero on Friday.
The fire was reported at about 12:40 p.m. on Hermosilla Avenue near Lobos Avenue.
A smoke plume from the fire could be seen from an ALERTCalifornia camera:
This story will be updated with new information as it becomes available.