They were arrested by detectives investigating the murder of 21-year-old Kavan Brissett, who was stabbed to death in August.
CRIME: Driver who left '˜loving' volunteer for dead in Sheffield fatal hit and run still at large The teens '“Â aged 18, two aged 17 and one aged 16 '“Â were quizzed over the death before being bailed.
POLICE: Reward of Â£5,000 still available in police hunt forÂ man wanted over Sheffield murder They have since answered their bail and have now all been released under investigation as enquiries into the death continue, South Yorkshire Police revealed this week.
TheÂ 18-year-old was arrested on suspicion of attempted murder and the younger teens were arrested on suspicion of conspiracy to rob.
Kavan was stabbed in an alleyway off Langsett Walk,Â near Upperthorpe and died four days later when his life support machine was switched off.
Nobody has yet been charged over his death.
Detectives want to traceÂ 29-year-old Ahmed Farrah in connection with the death.
They believe the Broomhall man, who is also known as Reggie, could hold vital information about the killing.
Farrah is said toÂ be actively evading arrest and detectives have warned anyone shielding him that they face prosecution.
Farrah has been described as '˜key' to police enquiries and the Crimestoppers reward of Â£5,000 is availableÂ for information leading to his arrest.
Anyone with information should call Crimestoppers, anonymously, onÂ 0800 555 111