A medical transport flight carrying a mother and her son disappeared off the coast of Nantucket early Saturday while en route from Bermuda to Boston. Authorities identified the passengers Monday as Marilyn Lavonne Bean, 66, and her 41-year-old son, Sergio Wayne Lottimore, both Bermudian nationals. It remains unclear which of the two was the patient being transported for medical care.

The aircraft, a Gulfstream G100, was operated by Latitude Air Ambulance, a Hamilton, Ontario-based company. The plane vanished during the flight over the Atlantic, prompting search and rescue efforts by U.S. and Canadian authorities. The company confirmed that four of its employees aboard the flight are presumed dead in the crash.

The U.S. Coast Guard identified the four Canadian crew members on Monday evening as Philip Gregory Childerhose, Thomas Henry Farquhar, Sarah Jane Paton, and Jolene Beth Weir. The Transportation Safety Board of Canada is leading the investigation into the incident.

Rear Admiral Matthew Lake, commander of the Coast Guard Northeast District, expressed gratitude toward the search crews and partner agencies for their swift response and pledged continued support for Canadian authorities in their investigation.

The aircraft was originally manufactured by Israel Aerospace Industries in 1996 under the designation Astra SPX but was later modified and registered as a Gulfstream G100. It was imported to Canada in 2012 and acquired by Latitude Air Ambulance in 2018.

The Bermuda Police Service released the names of the missing passengers on Monday, confirming their identities as part of ongoing efforts to provide information to the families and the public. Officials have not yet released details regarding the circumstances leading to the disappearance or the status of the search operation.