Police in Oxford have been called to a supermarket in Oxford after reports that a woman was stabbed.
Thames Valley Police were called at 3.10pm on Tuesday to a report that a woman was stabbed by a man outside the Co-op shop in London Road, Headington.
The offender then ran away from the scene in the direction of Stile Road.
The victim was taken by ambulance to the John Radcliffe Hospital with serious injuries.
The offender is described as black, of large build, with short dark hair. He was wearing a green bomber-style jacket with a tracksuit.
Detective Inspector Jim Holmes said: “Enquiries are ongoing in the area to locate the offender. Although we are in the early stages of our investigation, it is believed that the victim is known to the offender.
“People in the community may notice an increased police presence while this is ongoing.
“This incident took place in an area which was busy at the time and I would like to appeal to anyone who was in the area who saw what happened and to anyone who has any dash-cam footage to contact police.”