A search is underway for an air ambulance that lost contact during a trip from Bermuda to Boston. The plane was carrying six people when it vanished in the waters off Nantucket. Electrical problems were reported by the pilot, who declared an emergency as the plane approached the coast.

The pilot's situation was dire, with possible loss of navigational instruments due to the electrical issues. A sharp descent from cruising altitude was also reported.

Further details about the incident, including air traffic control audio, are available from the source. The Coast Guard is currently searching for the missing plane.