PLEASANTON (CBS SF) — A one-alarm fire at Valley and Bernal avenues in Pleasanton destroyed two homes under construction in a new subdivision Tuesday morning and damaged two others, according to fire officials.

The fire in a planned new subdivision on Valley just south of Bernal was reported at 2:04 a.m. after drivers on Interstate Highway 680 spotted the flames, according to Battalion Chief Joe Testa.

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Firefighters found two two-story homes well involved in flames and two three-story homes behind them starting to catch fire, Testa said.

Firefighters were able to save most of the three-story homes, although they sustained some damage on the side facing the fire, but the two-story homes were a total loss, Testa said.

Fire officials are working with police to investigate the fire, but have no reason to believe it is suspicious at this time, Testa said.

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Firefighters remain on the scene, as the homes are still smoldering and unsafe. The developer will need to bulldoze the destroyed homes, which were among the first to be constructed on the site.

Testa said the homes ranged in size from 2,500 to 3,000 square feet.

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