GLENDALE (CBSLA.com) — Crews spent nearly three hours early Saturday battling a three-alarm fire that tore through the roof of a Glendale business.

The blaze was reported at 1:50 a.m. on the 1800 block of West Glenoaks Boulevard, near a Smart & Final store.

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It took approximately 50 firefighters to have the fire knocked down by 4:45 a.m.

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Both commercial and office space suffered extensive damage.

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