San Bernardino County firefighters came to the 17000 block of Spencer Road at 1:30 a.m. and saw smoke coming from the attic vents. Firefighters cut multiple holes in the roof to vent the blaze in the attic and keep it from spreading.
Firefighters found between 30 and 40 mature marijuana plants in the master bedroom, which had been converted into a cultivation room. A firefighter suffered a minor injury when he touched a live wire from the grow operation's illegal modification of electrical wiring, fire officials said.
The firefighter was not taken to a hospital.
The cause of the fire is being investigated.
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