4 Canadians aboard missing Ontario-based air ambulance flying from Bermuda to Boston

Six individuals remain missing after a Gulfstream G100 corporate jet vanished from radar early Saturday en route from Bermuda to Boston, prompting an extensive search by the U.S. Coast Guard off the coast of Nantucket. The aircraft, carrying six passengers and crew, reportedly experienced a rapid descent from 23,500 feet to just 11,000 feet within three minutes before its final radar contact was lost near Nantucket.

The U.S. Coast Guard, coordinating efforts with Air Station Cape Cod, US Coast Guard Station Brant Point in Nantucket, and the USCGC William Sparling, has launched both air and surface search operations. Flight-tracking data indicates the Gulfstream G100, identified by tail number CGRJP, was on a routine journey from the Caribbean territory to Boston when it lost communication with air traffic control.

The plane, which was scheduled to arrive in Boston early Saturday, was last detected off the coast of Nantucket. The Coast Guard has not disclosed details about the six missing persons or the potential cause of the aircraft's loss of contact.