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COLUMBUS (WKYC) -- Police in Ohio say a 4-year-old girl has drowned in a pool during a party, apparently while guests were singing "Happy Birthday" to another child.

Columbus police say the family of Sinaia Moore found her at the bottom of the backyard pool Saturday evening in Columbus.

Authorities say many of the dozens of partygoers were singing "Happy Birthday" to a 1-year-old before adults spotted Sinaia at the bottom of the pool.

They tried reviving her until paramedics arrived and took her to a hospital, where she was pronounced dead.

Police say the girl had been wearing a float vest while in the pool, but it had been taken off.

Family members told police they thought the girl had gone inside or was playing on a trampoline.

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