Police are growing increasingly concerned for missing 82-year-old Archie Campbell from Darlington. He suffers from dementia.
Durham Police have requested local residents to check their sheds, garages and gardens for Archie.
Archie was last seen leaving his house on Parkside in Darlington just after 2pm on Tuesday 26th July.
He was wearing light jeans and a dark sweatshirt. Anyone with information is asked to contact police on 101.