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May 19, 2015, 1:54 AM UTC / Updated May 19, 2015, 1:55 AM UTC

A 10-year-old girl drowned in a cruise ship pool Sunday while the boat was Florida-bound, the Coast Guard said Monday.

The Norwegian "Gem," operated by Norwegian Cruise Line, was 75 miles off the coast of Myrtle Beach, South Carolina, when the girl drowned in one of the ship's pools, said Coast Guard Spokesman Nate Littlejohn. He said the Coast Guard was notified about an hour after the 4 p.m. incident.

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Norwegian Cruise Lines said in a statement that the company was "extremely saddened" to learn of the death. The ship's medical team had administered CPR, but the girl could not be revived, according to the statement.

The cruise left for a seven day trip to Florida and the Bahamas from New York on Saturday, the statement said. The ship arrived at Cape Canaveral, Florida, on Monday afternoon, according to the Coast Guard.

The Coast Guard is investigating the death, Littlejohn said.

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— Elisha Fieldstadt