Crown Princess Mette-Marit of Norway's son Marius Borg Høiby is charged with assault after 'serious incident' which left a woman in hospital with concussion

Crown Princess Mette-Marit of Norway's son was arrested after a serious incident on Sunday night. Marius Borg Høiby, 27, has spent more than 30 hours in custody after an incident in Frogner, Oslo