The U.S. Coast Guard has found debris from the missing medical transport aircraft that was carrying six people from Bermuda to Boston when it lost contact with the Federal Aviation Administration early Saturday, prompting a massive search off Nantucket, Massachusetts, a source familiar with the situ ation tells NBC News. The search for survivors continues, the source added. A fast response cutter, the CGC William Sparling, will continue search efforts throughout the night for the six people who were aboard the aircraft, the Coast Guard said in an update around 8:30 p.m. Saturday. Coast Guard Base Boston is expected to hold a press conference Sunday to provide an update on the search. A search and rescue alert notice was first issued for the Gulfstream G-100 aircraft around 1:20 a.m. local time on Saturday, the FAA said. The flight departed from L.F. Wade International Airport in Bermuda and was headed to Boston Logan International Airport with four crew members and two passengers on board. The Coast Guard Northeast District said there were crews searching in the air and on the water for the missing aircraft Saturday, noting the current search area was “off the coast of Nantucket.” The FAA was coordinating with the Coast Guard, as well as the Rescue Coordination Center, to locate the air ambulance. Massport confirmed in a statement to NBC10 Boston that the aircraft did not arrive at Boston Logan Airport as scheduled. “Our thoughts are with those on board and their loved ones as the search continues,” a Massport spokesperson said. Air traffic control audio posted by LiveATC.net offered a fragmentary and troubling glimpse of the flight’s final communications. “Roger, you said you’re coming in blind. Is that what you said?” a controller can be heard asking the pilot. The pilot’s transmission could not be heard in the recording. The controller later confirmed the pilot was declaring an emergency just before losing contact with the plane. The controller then asked other aircraft in the area if they showed the Gulfstream jet on their collision avoidance systems or whether they could reach them on the radio, but the medevac plane with the call sign “Heartbeat 104” was never heard from again. The aircraft, with Canadian aircraft registration C-GJRP, is owned by Latitude Air Ambulance of Hamilton, Ontario, FlightRadar24 shows. The director of flight operations at Latitude Air Ambulance told NBC News that the plane was carrying out a medical evacuation in Bermuda, and that Latitude Air Ambulance had an emergency response plan in place “absolutely for anything that might occur to any of our missions.” Four of the six people on board the flight that went missing early Saturday were Canadian nationals, the country’s Minister of Transport Steven MacKinnon said on X. Transport Canada is closely monitoring and working with authorities on search and rescue efforts, he said. The Government of Bermuda said that it has been in contact with the families of those on board and remains in contact with the overseas authorities coordinating the search. “My thoughts are with everyone on board and their families during this deeply worrying time,” Premier David Burt said. “We are praying that all six people will be found safe, and we thank the search and rescue crews for their continuing efforts.” The National Transportation Safety Board said it was gathering information about the situation Saturday morning but had no further update to share. The Associated Press and NBC News contributed to this report This story originally appeared on NBCBoston.com. This story uses functionality that may not work in our app. Click here to open the story in your web browser. ...read more read less