Pour patterns found following a Sunday morning house fire led Manteca firefighters to believe the blaze had been intentionally set throughout the residence.

Firefighters were called out shortly before 4 a.m. finding flames coming from the north side of the structure at 446 Chestnut Street.  The residence was vacant and reportedly facing foreclosure.

The fire was brought under control within 20 minutes. It was another 15 minutes before it was completely extinguished. Firemen said they had to cut a hole into the roof to control part of the blaze.

Several rooms had accelerant pour patterns the firefighters located in their follow up investigation.  While the house was empty it did have smoke detectors that were said to be functioning.

Damage to the building was set at $50,000 and $3,000 to the contents.  The fire was contained to a bedroom, kitchen and rear patio.  The aggressive fire attack using a number of engines and 20 firefighters kept nearby residences safe in the early predawn hour.

Fire crews remained on the scene for nearly three hours doing salvage, overhaul and investigation operations.