Detectives investigating missing Fife RAF serviceman Corrie McKeague, 23, are to carry out searches at a landfill site linked to his disappearance.
Police in Milton in Cambridgeshire said one of these lines of enquiry has been in respect of waste collections from the Bury St Edmunds area around the time of the last sighting of Corrie.
Corrie from Dunfermline, is based at RAF Honington near Bury St Edmunds and was last seen on CCTV at 3.25am on Saturday 24 September after separating from friends during a night out.
A bin lorry made a collection in the area a short time after the last confirmed sighting of Corrie and the lorry was seized in the early stages of the enquiry for forensic examination.
This did not reveal any traces of him, however the waste collection has been one line of enquiry police have persisted with and kept under constant review.
The landfill area identified is more than 920 square metres of waste down to a maximum depth of eight metres and it is estimated that it is likely take a team of specialist search trained police officers six to ten weeks to complete the work required.
On-site preparatory work is already underway and the full scale search likely to commence around Wednesday 22 February once this initial work has been completed.
Detective Superintendent Katie Elliott said: “This is the next logical step in the investigation. Behind the scenes we have been working systematically through the options and we have examined a very broad range of evidence.
“Preparation work is already underway for the search and this will be progressed as quickly as possible.”