A woman was stabbed in the Long Commons area of Coleraine on Saturday afternoon.
Police arrested a 35 year old man on suspicion of GBH with intent and a number of other offences including possession of a class B drug.
Inspector Jonathan Brown said: “The man was arrested following an altercation at around 12:20pm.
“He has been taken into custody for questioning.
“The woman was brought to hospital for treatment to stab wounds, which are not thought to be life threatening.”