A teenager was attacked in Oxford by three masked men who robbed him at knifepoint and cut his face.

The 18-year-old victim was sitting on a bench with a friend, in a park off Aristotle Lane, when they were threatened by three men with a knife who demanded money.

He handed over his phone, keys and wallet but one of the men cut his cheek before running off.

The attack happened between 10.45pm and 11.15pm on Wednesday and police are appealing for witnesses.

Three men have been arrested and released on police bail.