A private plane carrying six people crashed in an open field in upstate New York on Saturday, killing all on board, authorities say.

Among those on board were celebrated former Massachusetts Institute of Technology (MIT) football player Karenna Groff, her parents and her brother, according to a family statement.

The US National Transportation Safety Board (NTSB) said the family had been travelling for a holiday celebration when the crash happened.

A video of the final seconds of the flight obtained by officials showed the aircraft intact before it crashed into the ground at a high rate of descent, the NTSB said.