Police are searching the garden of a property on Teesside as part of their investigation into the murder of grandmother Naheed Khan.
It comes after Cleveland Police revealed in December they needed a person with 'crucial information' to get back in touch with them following a tip-off in November of 'real significance' to their investigation.
Naheed, 43, had links to Stockton, Middlesbrough and Thornaby.
She is described as Asian, of slim build and around 5ft 6” tall, with long, dark hair.
Naheed Khan has been missing since May 2018 and police believe her last movements were in Middlesbrough.
Detectives from Cleveland Police have in the past released a detailed timeline of her possible movements in central Middlesbrough before she was reported missing.
Crimestoppers have previously offered a £10,000 reward for information that helps find Naheed's body.