Multiple people were killed in a plane crash near Greenfield on Sunday afternoon, with multiple fatalities, according to the Northwestern District Attorney’s office.

A Federal Aviation Administration spokesman told the Herald that the two-engine Beechcraft Baron 55 crashed around 12:30 p.m. on Sunday and said there were three people on board. The FAA did not identify the three people on the plane.

The DA’s office would not confirm whether or not all three people on board were killed, but instead said there were “multiple fatalities.”

The FAA spokesperson said the administration and the National Transportation Safety Board are investigating the incident, with the NTSB leading the charge.

An NTSB representative said preliminary information on the incident is that the plane crashed under unknown circumstances near Leyden Wildlife Management Area. The NTSB investigator is expected to arrive at the scene Monday when the aircraft will be examined.

Information that will be gathered in the NTSB’s investigation includes fight track data, maintenance records, air traffic control communication records, possible surveillance video, witness statements, 72-hour background on the pilot and pilot’s license.

The spokesperson said the identification of passengers on board will be handled by local authorities and that the NTSB has no role in the release of the identities.

— Developing