Coleraine detectives have arrested a 30-year-old man on suspicion of attempted murder and grievous bodily harm with intent.
The arrest was made in Coleraine last Wednesday, and is in connection with an incident outside a bar in the Waterside area.
A man sustained stab wounds during the incident and a second head injuries. Both men were taken to hospital for treatment, but neither have suffered life threatening injuries.
The 30 year old man was later released on police bail, pending further enquiries.
Detectives have again asked for information from anyone who was in the Waterside area at around 01:20am on Sunday 08 December.