Two people were injured when their plane crashed on a river in Lee County yesterday. Illinois State Police say a small aircraft crashed around 12:30 Saturday afternoon near Grand Detour. State Police say the plane struck some power lines, and came to rest on ice on the Rock River. Police say two people in the plane, 50 year old David R. Manske, and 60 year old Jamie K. Nadowski, both of Machesney Park, Illinois were taken to an area hospital for treatment. State Police say the aircraft was recovered, transported and stored pending an F-A-A investigation.