Six people on a medical flight went missing off the coast of Massachusetts early Saturday morning.

The Gulfstream G-100 was bound for Boston’s Logan International Airport from Bermuda’s L.F. Wade International Airport, scheduled to arrive at 1:30 PM local time.

Flight‑aware data show the plane lost altitude from about 7,300 m to 3,300 m before communication ceased. An emergency was declared by the pilot, after air‑traffic control questioned a possible mid‑air issue.

The U.S. Coast Guard’s Northeast District has launched an air and sea search around Nantucket, while the FAA has issued a rescue notice. Search teams are combing the waters for debris or survivors.

Latitude Air Ambulances, an international medical‑transport company, operated the aircraft. Crew members included two pilots and two Canadian medical staff who had flown to Bermuda to pick up a patient and accompanying relative.

Bolstering reports, LiveATC.net provided transmissions that revealed a weak radio signal and an emergency declaration. A fire dispatcher had alerted local emergency crews to a possible electrical fault, but later noted the aircraft had lost both radio and radar contact.

Authorities continue to investigate the incident while rescuers scour the Atlantic near Nantucket. No further information has been released at this time.