Police continue to make inquiries into an apparent hit-and-run in Christchurch early on Thursday.
The victim - found with critical injuries on the road on the north side of the Gayhurst Road bridge - remains in ICU in a critical condition in Christchurch Hospital.
Police piecing together what happened are examining relevant CCTV footage in the area, says Detective Senior Sergeant Greg Cottam.
"We are also examining broken car parts left at the scene, and working to identify these.
"We would again ask anyone who saw the victim walking two dogs in the Dallington area around midnight, or knows how he sustained his critical injuries, to please get in touch with us."
If anyone has noticed fresh damage to a vehicle, especially frontal damage, we are interested in information on that as well.
Anyone with information is are asked to please contact Detective Ben Rolton on 021 191 1854 or email@example.com, or Crimestoppers anonymously on 0800 555 111.