A fire destroyed a vacant two-story home that was being renovated southeast of downtown San Luis Obispo early Sunday, according to the Fire Department.
The fire was reported about 12:30 a.m. at 879 Islay St., between Chorro and Morro streets.
The home collapsed fully about 10 minutes after firefighters arrived, according to the San Luis Obispo Fire Department.
Flames traveled quickly likely because the home had most of its interior walls taken out, fire officials said.
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Firefighters also worked to keep the fire away from apartments next door because that building was exposed to much of the radiant heat and flames from the burning home, according to the Fire Department.
Damage to both buildings was estimated about $250,000 total. Investigators are looking into what caused the blaze.