An overheated ceiling fan is believed to have been the cause of a fire that ignited inside Wells Fargo Bank on State Street in downtown Los Altos Friday.
The bank remained closed until Monday due to damages.
The one-alarm blaze sparked when the fan, located inside a storage room behind the bank's ATM machines, dripped combustible material onto a pile of boxes and papers positioned just below the fan, said Santa Clara County Fire Battalion Chief Robert Smith.
Smith said the smoke quickly set off the bank's fire alarm and sprinkler system, which held off the blaze until firefighters arrived on the scene.
Several nearby businesses began calling 911 around 7:45 a.m. to report large amounts of smoke escaping from the building's second-story metal grills.
County firefighters responded to the fire at around 7:50 a.m. and contained it less than 30 minutes later.
The building sustained minor structural damage -- mostly from smoke and sprinkler system flooding, according to Smith.
Wells Fargo Market Vice President Mark Haladwala declined to give a financial estimate on the total property damages, but said the bank resumed operation Monday.
No injuries were reported.