The U.S. Coast Guard says an Ontario air ambulance carrying six people has gone missing.

In a social media post, the agency says the Federal Aviation Administration lost contact with the plane early Saturday as it was travelling from Bermuda to Boston.

The coast guard says it has launched a search mission off the coast of Nantucket, an island in Massachusetts.

The aircraft, a Gulfstream G100 jet, is registered to Latitude Air Ambulance, according to the website Flightradar24.