This is the moment a knife-wielding robber threatened to stab a bus driver before stealing his takings.

Two youths with their faces covered by scarves are captured on CCTV as they hold the driver of a route three Stagecoach bus at knifepoint at The Oval in Rose Hill, Oxford.

One of the thugs threatened the driver with a four inch blade before stealing a cash box containing £70 and fleeing into the housing estate.

The raid, which happened at 12.20am on Wednesday, September 27, is the second time in under a year thugs have robbed a bus driver at knifepoint in Rose Hill.

Thames Valley Police and Stagecoach released the footage yesterday, asking members of the public and witnesses to come forward with information.

Pc Jo Downer, of the Oxford Robbery Team, said: "If you recognise these people or the clothes please contact us.

"Two passengers were on the bus. One has come forward as a witness and I appeal for the other to come forward to help us with the inquiry."

Chris Child, a spokesman for Stagecoach, said: "The bus driver is obviously very upset, however, he has returned to work.

"We have CCTV cameras in our buses and provide footage to police. It is important that these people are caught."

The men caught on CCTV footage are described as white and in their early 20s.

One was wearing a black Gap baseball and a light top and the other was wearing a tracksuit top with the numbers 1924 written on it.

Both are around 5ft 9in and of slim or average build.

Anyone with information should call Pc Downer on 08458 505505.