Police searching for an RAF serviceman from Fife who disappeared in the early hours of Saturday have released CCTV footage taken shortly before he went missing.

Corrie McKeague is seen to sleep in a doorway before getting up and walking away.

This was the last time the 23-year-old gunner was seen after a night out in Bury St Edmunds, Suffolk at around 3.20am on Saturday.

Officers fear he may have tried to walk home to RAF Honington, which is a 20 minute drive away or almost three hours away on foot.

He has not been in contact with anyone since, something his family say is out of character.

Speaking on Wednesday, Chief Inspector Simon Mills said: "He is known to go out nights with his friends and go back on foot regardless of distance.

"For him to go missing is abnormal behaviour, but for him, walking back is normal.

"The reason he was reported missing is that he failed to show at work.

"We want to hear from anyone who may have seen him on Friday night or early Saturday morning and we want any dog walkers and residents with outbuildings to check for anything unusual.

"We're concerned now because of the vulnerability. If he's injured himself between here and RAF Honington, it's a vast area for us to look for him."

Mr McKeague, originally from Dunfermline in Scotland, was reported as missing to police on Monday afternoon.

He is white, 5ft 10in tall, of medium build, with short light brown hair and was wearing a light pink shirt and white jeans or trousers at the time he was last seen.

His mother Nicola Urquhart, 48, has posted his photo on Facebook and appealed for people to share it in the hope it will help find her son.

The National Police Air Service helicopter and the Suffolk Lowland Search and Rescue has been assisting searches in the area between the RAF base and Bury St Edmunds.

Officers would like to hear from anyone who may have seen him since, or anyone who may have information about where he is now, and are asking them to get in touch immediately.