A man in his 40s suffered life-threatening injuries when he was attacked outside a takeaway.
He was found lying on the ground outside Kebapizza in St Matthew's Street, Ipswich, at about 00:15 GMT.
He was taken to hospital by ambulance with "serious and life-threatening injuries", Suffolk Police said.
Three males aged between 16 and 36 have been arrested on suspicion of assault and remain in police custody. Officers urged witnesses to contact them.