A gang of teenage robbers attacked a man, a woman and a student in three separate bag snatches in Oxford.

The first robbery happened at about 10.30am yesterday while a student was reading in Bury Knowle Park, Headington, when a boy came up and stole his bag.

Then at 1pm a woman was in South Park when a boy tried to grab her bag but when she screamed he ran away.

Another bag was stolen at 2.45pm from a man who was sitting on a bench in Bury Knowle Park.

The robbers are thought to be a group of between four and seven white males aged about 14 or 15. They were either wearing blue sweatshirts or red jumpers.

PC Charlotte Dunford said: "I would like to reassure residents that we are doing all that we can to catch the offenders and we will be increasing patrols in the area."

Anyone with information should contact police on 08458 505505 or speak anonymously to Crimestoppers on 0800 555 111.