WASHINGTON (AP) — The Pentagon says the remains of three U.S. Marines killed when their helicopter was shot down during the Vietnam War will be buried next week at Arlington National Cemetery.

The Defense POW/MIA Accounting Agency announced Friday that the remains of the three men will be buried as a group with full military honors next Thursday. The three men are: Capt. John A. House II, of Pelham, New York; Lance Cpl. John D. Killen III, of Davenport, Iowa; and Cpl. Glyn L. Runnels Jr., of Birmingham, Alabama.

The Pentagon says their remains were identified in March 2017.

Military officials say House, the oldest at 28, was the pilot of the Sea Knight helicopter that crashed after being hit by enemy fire on June 30, 1967. Four others also were killed, including 18-year-old Killen and 21-year-old Runnels.

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