The incident took place around 2:41 p.m. Sunday on Strawberry Hill Avenue near Roxbury Road, said Norwalk Police.
Arriving officers located a male victim who was suffering from serious injuries. The victim was transported by ambulance to the Norwalk Hospital, police said.
Investigators described the suspect vehicle as a black Honda SUV, which fled north on Strawberry Hill after striking the victim.
Anyone with information or video surveillance in the area is asked to contact 203-854-3011. Anonymous tips can be left at any of the below contacts. Norwalk Police Tip Line: 203-854-3111.
Anonymous Internet tips can be sent to Norwalk Police website at www.norwalkpd.com
Anonymous text tips can be submitted by typing "NPD" into the text field, followed by the message, and sending it to CRIMES (274637).
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