Police have concerns for an elderly man last seen at a Christchurch shopping mall on Tuesday afternoon.
Lawrence O'Connell, of Rangiora, was visiting The Palms in the suburb of Shirley with his wife when he became agitated and is believed to have walked out of the mall.
Senior Constable Anna Stenhouse says the 67-year-old has a brain injury from a stroke and requires daily medication.
Mr O'Connell was only lightly clad and it was cold overnight on Tuesday.
The man is described as Pakeha, of average build and medium height.
He was last seen clean-shaven, wearing a black cap, black trackpants, navy vest, blue sweatshirt with grey sleeves and black shoes.