Police today appealed for witnesses after an attempted robbery at knifepoint on two girls in Oxford.

The 17-year-old girls were walking along Fairacres Road when two teenage boys approached them on bicycles.

They threatened them with a knife and told them to hand over their wallets. The girls challenged them and the offenders cycled off.

The incident happened at about 10.20pm on Monday, but details were only released today.

Police said the boys were white, about 5ft 8in tall and aged about 16.

One was skinny and was wearing a grey hooded top with the hood up and black tracksuit bottoms. The other was bigger build, with short brown hair and was wearing a dark Nike hooded top.

Det Con Steve Martin said: “I appeal to anyone who was in the Donnington area of Oxford on Monday evening and saw two teenagers on bikes acting suspiciously to contact police.”

Anyone with information that could assist police enquiries is urged to contact Det Con Martin via Thames Valley Police Enquiry Centre on 0845 8 505 505.

If you don’t want to speak to police and don’t want to leave your name contact the Crimestoppers charity on 0800 555 111.