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MIAMI (CBSMiami/AP) — A Keys’ based volunteer group has discovered more remains of World War II Marines on a Pacific atoll.

Mark Noah, head of History Flight, said that 12 sets of remains were found on Tarawa between January and March and a 13th set of remains was found this week.

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The Pentagon’s Defense POW/MIA Accounting Agency confirms more remains have been found, although it couldn’t confirm the number. The agency says it will return the remains to the U.S. this summer.

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Last year, Honor Flight found the remains of 35 Marines on Tarawa, which is part of the island nation of Kiribati, and the Defense Department found a 36th set.

All were returned to the U.S. The Pentagon says 23 of them have been identified.

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