The two people killed were aboard a Cessna 172 plane. Their names weren't immediately released. Peters said the helicopter was damaged but landed safely with three people aboard. He said the occupants of the helicopter walked away, and he was not aware of any injuries on the ground.
According to weather observers, conditions were clear with light winds in the area around the time of the accident.
Peters said it appeared the helicopter was attempting to land and the Cessna was taking off when they collided. He described the airplane as a small, general aviation four-seater.
The Cessna's registered owner is Michael W. Price of Elkton, Va., Peters said. The helicopter is owned by PHI Inc. of Lafayette, La.
A call to the home of the plane's owner went unanswered Friday evening, and a representative of PHI did not immediately return a phone message.
Peters says the National Transportation Safety Board is investigating.