Invercargill police are searching for what they believe to be a dark-coloured Toyota Hilux in relation to a hit and run in Invercargill on Sunday.
A 19-year-old man was hit on Marama Avenue South in Otatara about 6.15am.
He remained in Dunedin Hospital in a serious condition.
Detective Sergeant Scott MacKenzie said investigators had this afternoon released CCTV footage of a vehicle they hoped to identify.
"We believe the vehicle was a dark coloured Toyota Hilux or similar," he said.
"The vehicle was captured on CCTV around the time of the incident and we would like to speak with the driver to see if they can help us establish what has happened. We are also appealing to members of the public who know anything about what has happened or who was involved to come forward.
"We are keeping an open mind as to what has occurred but want answers for the man's family.
"Police would also remind the public that when considering if you can help with information, on Sunday morning at 2am clocks went forward an hour for daylight saving."
Anyone with information was asked to contact Police on 105 quoting file number 220925/5483.