SUN VALLEY (CBSLA.com) — Firefighters battled a blaze at a portable toilet company in Sun Valley Tuesday night.

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The flames erupted around 8:15 p.m. at Mission Valley Sanitation at 9364 N. Glenoaks Boulevard.

When crews first arrived to the scene, the fire was through the roof, reported Sky9’s Stu Mundel. They quickly went into a “defensive mode” to keep the blaze from spreading to other buildings.

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Portions of Glenoaks were closed during the firefight, which lasted nearly 50 minutes.

No injuries were reported.

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The cause of the blaze is unknown.