By RNZ

Police have called off the formal search for a 79-year-old Christchurch woman missing in sub-zero temperatures.

The woman, Elisabeth, was reported missing in Riccarton on Wednesday night.

Police are still appealing for information, and asking people in Riccarton and surrounding areas to check their security cameras, sheds and garages.

There was an unconfirmed sighting of her at Moa Vale about 10am on Thursday.

Elisabeth was wearing blue pants, a dark-coloured long-sleeved top, black shoes and had distinctive long blonde/white hair.

She had been admitted to a Christchurch rest home the day she disappeared.

A Ryman spokesperson said she was referred for respite care on Wednesday.

Staff realised she had left shortly after 6pm and searched the home before calling the police.

Anyone who sees Elisabeth should ring 111 immediately and use the reference number 250604/5465. Non-urgent information can be provided online at 105.police.govt.nz, using “Update Report”, and quoting the same reference number.

- RNZ