From WKBW and WTVR:
A missing single-engine plane that departed from Richmond, Virginia International Airport on Sunday afternoon en route to Ontario, Canada has been found in Potter County, Pennsylvania, according to CNN affiliate WKBW in Buffalo. No further details were released including the status of the plane or the three passengers who were on-board. The plane, owned by St. Catharines Flying Club, reportedly changed course to avoid a thunderstorm. After the change of course, the FAA lost contact with the plane near Potter County. The search for the missing plane focused in the areas of Potter, McKean, Cameron and Elk Counties. In a statement, the FAA said it has lost radar contact with the plane about 7 p.m. Sunday. The FAA issued a notice to air traffic facilities, pilots and airports to report to the FAA if they locate the aircraft.
Pennsylvania State Police had no information available Tuesday morning. Other media sources said the Civil Air Patrol had taken command of the search. Updates will be provided when information comes in.