A police pod has been set up in the town where Fife airman Corrie McKeague went missing nine weeks ago.
Officers showed CCTV footage to people on Thursday in an attempt to identify those in the area around the time the 23-year-old was last seen.
They will continue on Friday as the hunt goes on for the RAF serviceman, from Dunfermline.
Corrie was last seen in the centre of Bury St Edmonds at 3.25am on Saturday September 24, following a night out just a few miles from his base at RAF Honington.
A pod was used in the early stages of the inquiry and although efforts have continued to trace everyone caught on camera in the area of Brentgovel Street and Short Brackland between 3am and 8am, several remain unknown.
Suffolk Police said: “There remain a number of people who have not been identified, however in many cases there are a few distinguishing characteristics to help with this process, so officers will again go out in the town, this time during the day, to see if anyone can assist.”
Police are also continuing detailed analysis of CCTV footage and further work around the footage to ensure nothing has been missed.
Anyone with information is urged to call the incident room on 01473 782019.