Attempted murder trio released by Sheffield detectives
The 20-year-olds were held by police on suspicion of attempted murder after a knife attack outside the Old Firth Park Library, Firth Park Road, Firth Park, on Friday night.
An 18-year-old man was seriously injured and remain in hospital in a stable condition today.
On Sunday a 21-year-old man was seriously injured in a stabbing on Brimmesfield Close, Arbourthorne.
Two men, aged 22 and 31, were arrested on suspicion of public order offences and are still in custody.