A man in his 70s is in hospital with serious head and facial injuries after being assaulted while walking on Summit Rd in Christchurch's Port Hills late last month.
Police said the man was near the top of the Rapaki Track when he was approached and assaulted by another man between 11pm on July 20 and 7am on July 21.
The assailant was described as a Pākehā, aged in his early 30s, a spokesperson said.
"He was driving an older-style van, which had a shape similar to a VW Kombi van, with a square front, flat roof and metal or chrome bands across the front grille.
"The van is light brown/beige or grey-coloured and has oval headlights.
"The man had two dogs with him, which appeared to be part-Dobermann and were aggressive."
Anyone with information that could help police identify and locate the man responsible for the assault should contact police on 105.
"We are also interested in any dashcam footage from motorists travelling on Dyers Pass Road to the west side of Summit Road between 11pm on July 20 and 7am on July 21."
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