Police have arrested a 21-year-old man from the Stowmarket area following a serious assault in Needham Market just after midnight on Sunday.
Police were called to reports of a group of men fighting in the High Street.
Two men were assaulted during the incident, one in his 30s receiving a serious head injury. He was taken to Addenbrookes Hospital where his condition is said to be stable.
The 21-year-old man was arrested on suspicion of causing grievous bodily harm and is currently being held for questioning at the Bury St Edmunds Police Investigation Centre for questioning.