SACRAMENTO (CBS13) — Authorities say debris associated with a homeless camp caught fire under I-80 on Tuesday morning.

The incident happened under eastbound I-80, west of Norwood Avenue. Exactly what started the fire is unclear, but crews found that no hydrants were in the area. Multiple engines and a water tender responded to the scene to help, the Sacramento Fire Department says.

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Firefighters say a puppy was also found near the scene. It has been brought to safety and will be in the care of the Front Street Animal Shelter.

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While the smoke has noticeably blackened the underside of the freeway, the structure was not damaged.

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No injuries have been reported.