Delaware State Police say 55-year-old Robert Flanagan of Dover was taken to Christiana Hospital in critical condition on Saturday night.
Troopers say Flanagan was struck as he was rollerblading on the shoulder of westbound Rehoboth Avenue west of Church Street. Troopers say the vehicle did not stop after the crash.
Investigators are asking for the public's help in identifying and locating the vehicle that fled from the scene.
