A 19-year-old man who died after being stabbed in a "brutal and tragic" fight has been named as Ahsan Khan.
Mr Khan died in hospital after being found seriously injured on Cheviot Avenue, Oldham at about 04:30 GMT on Sunday.
Two men aged 21, and a 20-year-old man who were arrested on suspicion of murder have been released on bail.
A 19-year-old man also arrested on suspicion of murder remains in police custody.
Det Supt Debbie Dooley said: "This was a brutal and tragic incident and we have made some encouraging progress with our lines of inquiry so far.
"However, a crime of this severity requires as much detail as possible, therefore it is vital that those who know about the circumstances behind this get in touch with police."