Five teenagers have been arrested after a 17-year-old boy was stabbed at what police believe was a flat party.
Two other people, a 17-year-old boy and a 16-year-old girl, were also injured in the incident.
Emergency services were called after the incident at an address in Hounds Gate, Nottingham, shortly after 11.40pm on Friday, Nottinghamshire police said.
The victim was taken to hospital with serious but not life-threatening injuries.
An 18-year-old man and four boys aged 17 have been arrested and remain in custody, the force said.
Police closed roads around Hounds Gate, Maid Marian Way, Standard Hill and Lenton Road.
Nottingham Castle said on Facebook it was temporarily closed on Saturday morning because of the road closures, but it reopened later.
DI Chris Berryman said: “We believe this incident happened during a party at a flat and we are working to understand events in the moments before, during and after what happened.
“We particularly want to hear from anyone who was inside the flat, or who witnessed people running from the scene shortly afterwards.
“Drivers with dashcam footage are also asked to get in touch if they witnessed any part of this disturbance.
“This kind of violence is utterly unacceptable, and we will do whatever it takes to bring the person or people responsible for these injuries to justice.”
There have been a number of recent knife crime incidents in Nottingham. A 31-year-old man and a 28-year-old man were arrested on Thursday after reports of a fight involving a machete in Lower Parliament Street, Nottingham.
A 16-year-old boy also pleaded guilty in relation to a stabbing at Nottingham’s Primark store on 23 February.
Supt Kathryn Craner said: “At present, there is nothing to suggest that this incident is linked to those earlier in the week. We will however keep an open mind while the events of last night are meticulously investigated.
“We will continue to maintain a high and visible presence in the city to provide reassurance and speak with anyone who has concerns.”
Source: www.theguardian.com