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CARLSBAD, Calif. — A 12-year-old boy was hospitalized with injuries received in the crash Saturday of a single-engine plane on Carlsbad State Beach, authorities said.

It happened just after 3 p.m. in the 4600 block of Carlsbad Boulevard, near the Encina Power Plant, when the plane’s engine failed as it flew over the water and lost the banner it towed, Lt. Justin McHenry of California State Parks said.

The plane dove toward the beach and crashed, leaving the 23-year-old pilot uninjured, McHenry said. Video from the scene shows a single-engine plane upside down in shallow water.

The injured boy was taken to San Diego’s Children’s Hospital, according to McHenry.

The Federal Aviation Administration told FOX 5 the Piper PA18 is owned by an El Cajon company named Air Ads Inc.