Police in Bristol have cordoned off part of Barton Hill Urban Park
We're told someone was stabbed and they remain in a stable condition in hospital.
Officers have also increased reassurance patrols - and say investigations continue
A police spokesperson said: "We’re investigating an incident in which an 18-year-old man has been stabbed in the Morley Street area of Barton Hill, Bristol.
"The incident happened sometime between 11.10pm and 11.20pm on Saturday (19 October).
"The victim was taken to hospital for treatment, where he remains in a stable condition.
"We’ve cordoned off the area around where this offence took place to carry out further enquiries.
"Reassurance patrols will be taking place and any residents who have concerns should speak to their local neighbourhood officers."