An 18-year-old man is in a serious condition in hospital following a stabbing, police have said.
Officers were called to Sharrow Lane in Sheffield at about 17:00 GMT on Saturday to reports of a man being stabbed.
The victim was taken to hospital where he remains in a serious condition, a South Yorkshire Police spokesperson said.
An investigation was under way to identify those responsible, they added.
Anyone with information is urged to contact South Yorkshire Police.