The search for missing Torbay woman Pat Wearn has been suspended.
Wearn, 73, who suffers from Alzheimer's, hasn't been seen since she left her Caversham Drive home last Monday, to go for a regular walk.
Hundreds of police, LandSAR, Navy, Airforce, Civil Defence and Fire Service personnel have searched properties, reserves and bush areas in the Torbay, Browns Bay and Long Bay areas over the past week, but there has been no sign of her.
Members of the Police National Dive Squad travelled from Wellington and searched several waterways and ponds in the Torbay area.
Police have consulted with medical experts who have expertise in survival and "sadly the time period in which Mrs Wearn could be expected to survive has been well passed", said Inspector Claire Humble, Waitemata police.