A 17-year-old boy has been stabbed four times in a city-centre street after a row with a gang of people.
The teenager was attacked in Long Row, Nottingham, early on Sunday morning after the disagreement with the group of four people, police said.
The victim, who has not been named, was taken to Nottingham's Queen's Medical Centre where he underwent surgery.
Police are asking for anyone who saw the group, which includes a woman, to contact them.
The main offender was described as a white man, aged 20 to 40, 5ft 8in to 5ft 10in tall, of athletic build, with short, brown, straight hair. He was wearing a light grey tracksuit.
A second man involved was described as white, 18 to 23, with short brown hair. He was wearing a black Puma t-shirt.
A woman at the scene was described as white, 18 and 23 with shoulder length brown hair.