New York Police Department divers were captured on aerial video responding to the fatal Hudson River helicopter crash last week in Jersey City, New Jersey.

The National Transportation Safety Board said on Saturday that the helicopter involved in a crash that killed six people in New York earlier this week was not equipped with any flight recorders and that the accident occurred during the aircraft's eighth flight of the day.

The rotor of the helicopter from last week's deadly crash has been retrieved from the Hudson River, four days after the devastating accident that killed all six people on board, according to a statement from the National Transportation Safety Board.