A 21-year-old has been left in a critical condition after he was stabbed in a park in broad daylight.
The man was attacked in People's Park, Banbury, at around 4pm on Saturday (11 June), suffering serious stab injuries.
Members of the public rushed to help the man before he was taken to hospital where he remains in a critical condition, Thames Valley Police said.
No arrests have been made so far, the force said on Sunday, when the park remained closed to the public.
Senior investigating officer, Detective Inspector Rob Platt, who is based at Banbury Police station, said: "This incident occurred in the middle of the afternoon, and I am aware that there would have been many witnesses to what has happened.
"I would like to thank those members of the public who came to the aid of the injured man. Their actions are greatly appreciated as they provided emergency first aid to the victim before medical professionals arrived.
"I appreciate that this incident has caused concern in the local community, but I would reassure the public that we are investigating the circumstances thoroughly, and although in the early stages of the investigation, are making progress with these enquiries.
"I would ask those who have camera footage of the incident to please not share this online on social media, but instead, please get in touch with Thames Valley Police."
"There will be an increased police presence in the area while this investigation continues, and if you have any concerns, please don’t hesitate to speak to any of our officers and staff.
"I would also like to thank the community for their patience and understanding while we investigate this incident.
"The park is currently closed, but we will look to re-open it as soon as we can."
He asked for anyone with any information to contact Thames Valley Police on 101, quoting reference number 43220255119, or make a report online.