The U.S. Coast Guard in Alaska found the wreckage of a small plane atop frozen sea ice on Friday, after the aircraft suddenly lost altitude on Thursday and the crash killed all 10 people on board, officials said.

The Coast Guard continues to search for a missing guardsman who went overboard on Tuesday while aboard USCGC Waesche (WMSL-751) off the Pacific coast of Mexico, near the border with Guatemala. The cutter was conducting routine counter-drug patrolling approximately 300 nautical miles south of Mexico when the crew discovered that a guardsman was unaccounted for,