The "drowning human" police responded to in Florida on Sunday — which turned out to be a horse stuck in a pool — has died, sheriff's officials said Monday.

Investigators discovered a "poor horse," as described by the Palm Beach County Sheriff's Office, that fell into a pool at a home in Lake Worth.

A deputy, in full uniform and 22 days before his retirement, waded into the pool to reassure the large, dark-colored steed.

He sat down on the steps and calmed the animal, who looked to be standing in around three feet of water.

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The sheriff's office worked with Palm Beach County Fire Rescue to remove the horse from the pool. But on Monday, officials said the horse later died. A cause of death wasn't immediately announced.

The Associated Press contributed to this report.