The Marine Corps said Tuesday that trace elements of DNA have been found from U.S. Marines who died when two helicopters crashed off the coast of Hawaii last month. No bodies have been found in the January death of 12 Marines, marking the worst training mishap in the U.S. military over the last decade. The DNA traces were discovered during during search-and-rescue missions that ended on Jan. 19 and the families of the fallen Marines were informed. according to a Marine Corps statement. “None of the 12 Marines that were involved in the Jan. 14 mishap have been recovered,” it added. The cause of the crash is still being investigated.