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"It was a big fire," San Jose fire Capt. Steve Alvarado said of the blaze at 345 Northlake Drive. The first arriving firefighters "called a second alarm right off the bat," he said.
A passerby initially reported the flames around 4:50 a.m., and a California Highway Patrol officer in the area also reported seeing smoke coming from the building, according to Alvarado.
Firefighters tore a hole in the roof to ventilate the flames and prevent them from spreading horizontally, Alvarado said.
The blaze destroyed a chiropractic and massage business located in front of the building where the flames appear to have ignited. Other neighboring businesses endured smoke damage but were not touched by the fire, according to Alvarado.
No injuries were reported.
Crews remained at the scene mopping up for several hours after the fire was declared under control, Alvarado said.
The fire caused at least $400,000 in damage, he said. The cause remains under investigation.
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