Derby knife attack: Four injured in street
A teenager remains in a serious condition in hospital after he and three men were attacked with a knife.
Derbyshire Police said an argument broke out between two groups of men in Charlotte Street, Derby, at 20:30 BST on Friday.
Two men, aged 35 and 22, and a 17-year-old boy have been arrested. The 35-year-old has been released on bail while the other two remain in custody.
The 19-year-old man is being treated at Queen's Medical Centre, Nottingham.
Police said the four injured men were from the same group.