A massive search is underway off Nantucket on Saturday morning after a Gulfstream G100 carrying six people disappeared from radar while flying from Bermuda to Boston.

The G100 was operated by Latitude Air Ambulance, which provides medical evacuation and repatriation services.

Company spokesman Clarence Togeretz confirmed to The New York Times that the G100 was missing and said Latitude had contacted search-and-rescue and law enforcement agencies.

Local outlet Nantucket Current said the search-and-rescue effort is focused on an area about 13 nautical miles south of Nantucket.

Flight-tracking website Flightradar24 shows the area of interest where aerial and sea-based Coast Guard assets are searching.

X user Breaking Aviation News & Videos lists the Coast Guard assets searching for the G100:

• HC-144 Ocean Sentry airplane crew from Air Station Cape Cod
• HC-130 Hercules crew from Air Station Elizabeth City
• MH-60 Jayhawk helicopter crew from Air Station Cape Cod
• 47-foot motor lifeboat crew from Station Brant Point
• Fast response cutter William Sparling (WPC-1154)

Nantucket Current said the G100 "declared an emergency before losing contact."