By CBS13 Staff

SACRAMENTO (CBS13) — Investigators are looking into what started a fire at a Sacramento RV park early Wednesday morning.

The scene was along Auburn Boulevard at the Sacramento Shade RV Park.

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Firefighters say flames broke out around 3 a.m. At least four RVs were damaged in the fire.

One resident reported hearing explosions as the fire broke out.

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No one was inside either of the RVs that caught fire, crews say. No injuries have been reported.