Marius Borg Høiby was arrested by the police on Sunday.
– Last weekend something happened that should never have happened. I caused bodily harm and destroyed objects in an apartment when I was drunk on alcohol and cocaine after an argument, he tells NRK.
He further says that he struggled with both mental illness and addiction for a long time. Something he will now seek help for.
– My addiction and my diagnoses do not excuse what happened in the apartment in Frogner on Sunday evening last weekend. I want to be accountable for what I have done and will explain myself truthfully to the police.
The affected woman, who is in her 20s, suffered a concussion in connection with the assault. Marius Borg Høiby is also suspected of vandalism when he put a knife in the apartment wall.
He was released after the arrest and the case is under investigation.