AUGUSTA COUNTY, Va. (CBS19 NEWS) --Federal officials are investigating a weekend plane crash that occurred along the Blue Ridge Mountains.

The Federal Aviation Administration and the National Transportation Safety Board are both looking into the June 4 crash of a Cessna Citation in the area of Montebello, Virginia.

The crash occurred around 3:30 p.m. Sunday in mountainous terrain.

According to the FAA, the plane had taken off from the Elizabethton Municipal Airport in Elizabethton, Tennessee.

It was headed for the Long Island MacArthur Airport in New York.

The Continental United States North American Aerospace Defense Command Region reports F-16 fighter jets were scrambled when the plane flew over restricted airspace in Washington, D.C. This may have resulted in a sonic boom that was heard across the region.

The Associated Press reports the plane inexplicably turned around over Long Island and flew down over D.C. before crashing.

While the plane was over the nation's capital, it was technically flying above some of the most heavily restricted airspace in the country.

Officials say the plane was unresponsive when they tried to contact it. The six fighter jets responded, but they did not shoot the plane down. They did attempt to use flares to get the attention of the pilot.

The FAA adds there were four people on board, but no survivors were located near the George Washington National Forest.

First responders were able to reach the site of the crash on foot around 8 p.m. Sunday.

The plane was registered to Encore Motors of Melbourne Inc., a Florida-based company.

Further information regarding this incident is expected to come from the NTSB.

Information from the Associated Press included in this report.