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

Air ambulance went missing early Saturday

The U.S. Coast Guard is searching for an Ontario-based air ambulance jet that has gone missing with six people on board while flying from Bermuda to Boston on Saturday.

The Gulfstream G100 jet with tail number C-GRJP is registered to Latitude Air Ambulance, a Hamilton-based air ambulance provider, according to the tracking website Flightradar24.

The company lost contact with the jet around 1:30 a.m.today, said Clarence Togeretz, director of flight operations at Latitude. The U.S. Coast Guard's northeast division said the Federal Aviation Administration also reported losing contact with the jet in the early hours of Saturday.

There were two pilots and two medical staff — all of whom are Canadian — on board. A patient and their relative were also on board. They are not Canadian and were picked up in Bermuda, Togeretz told CBC.

Togeretz said they are staying optimistic that everyone will be safely found.

Air and surface teams are searching for the aircraft off the coast of Nantucket, Mass., the U.S. Coast Guard's northeast division said in a social media post.

The jet's last trip was from Hamilton to the North Atlantic island of Bermuda on Friday evening, according to flight history on Flightradar24. Before Friday and Saturday's flights, the jet had flown within Canada over the past week.

CBC News has contacted federal and provincial authorities for more information about the aircraft.