Police have interviewed a man who spoke to RAF serviceman Corrie McKeague at a takeaway restaurant on the night he disappeared.
Officers have identified a number of people who were at Pizza Mama Mia at the same time as Corrie on 24 September.
They're also investigating a possible sighting of the airman at the back of a sugar beet factory at around 4.20am. Detectives stress it is unconfirmed.
There are still no confirmed sightings of Corrie beyond 3.25am, when he was captured on CCTV walking down Brentgovel Street.
Further searches are being carried out between the A143 and A134.
Suffolk and Norfolk police search teams are being joined by volunteers and RAF specialist search personnel.
Today marks exactly two years since the disappearance of RAF serviceman Corrie McKeague in Bury St Edmunds.
The father of RAF serviceman Corrie McKeague has claimed his son is "no longer missing" and that he now knows what happened to him.
Suffolk Police said Corrie's disappearance will now be treated as a cold case as police say there are no "realistic lines of enquiry left".