(Portland, OR) -- Police are investigating, after a pedestrian was struck and seriously injured in Southeast Portland. Authorities say the wreck happened in the area of Division Street and 148th Avenue around 8:45 last night. Police say the vehicle left the scene, but the man later came back to aid the driver, then left before police got there. Officers then arrested a woman who later got in the car and left the scene before crashing. The man is still at large.