India, Oct. 4 -- Bermuda-Boston Plane Missing Live Update: A routine medical flight from Bermuda to Boston turned into a desperate search over the Atlantic after a Gulfstream G100 carrying six people disappeared near Nantucket. Now, a debris field, troubling air traffic control exchanges and a sudden change in the aircraft's flight path are giving investigators new clues about what happened in the final minutes.

The Canadian-registered medical transport aircraft was flying from L.F. Wade International Airport in Bermuda to Boston Logan International Airport early Saturday when controllers lost contact with it. The US Coast Guard later confirmed that search crews found debris associated with the missing plane off Nantucket.

The aircraft ...