The mum of Corrie McKeague has been forced to deny claims that his younger brother killed him.

Trolls on web forums have been making the surreal allegations adding to the family's heartbreak after their son disappeared after a night in Bury St Edmunds on September 24 last year. 

The theory suggests that Corrie's brother Darroch, 21, travelled all the way from Dunfermline to Suffolk to kill his sibling, despite phone calls showing he was at home and he started work at 7am the next day. 

Nicola Urquhart, 47, wrote on the 'Find Corrie' Facebook page:"For those that believe Darroch drove to Bury to kill or hide his brother; Darroch was in Dunfermline in his bed (this can be proved as his phone would be registered on the mast) talking to his brother on the Friday night.

"Darroch was then at his work at 0700 hours on the Saturday until 1700 hours. This can be corroborated by endless people and CCTV. It takes 7 hours to drive to Bury.

"To those who support the pages and people that make comments like this about a 21 year old who is missing his best friend and brother, words fail me.

"They don't actually fail me, but it most certainly would not be dignified to write it."

Corrie's uncle, Tony Wringe, who is a former serviceman branded the claims "some what surreal."

Tony said the family needed to comment because“there is a need to say it for one of the web forums which doesn’t seem to want to let fact get in the way of their theories”.

“Rather than go the libel route, we’ll just state it here publicly”.

Darroch, a butcher, had made plans to visit Corrie a month after his disappearance and the siblings planned to travel back to Scotland together.