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 an apartment in Frogner,Oslo - where a woman in her 20s called the police.

According to Se og Hør, Mette-Marit's eldest son,whose father is Morten Borgan step-father is heir to the Norwegian throne  Crown Prince Haakon,allegedly attacked the woman 'psychologically and physically'. 

She was taken to hospital where she was diagnosed with a concussion before being released in the early hours of Monday morning.   

The Norwegian publication reported Borg Høiby was put in solitary confinement and a blood test was taken to find out if he was under the influence of drugs.

When he turned 20 the royal court announced he was stepping away from public life and his profile was removed from the family's official website

However,when he turned 20 the royal court announced he was stepping away from public life and his profile was removed from the family's official website.

'Høiby will not conduct any official activities on the Royal Family's behalf,' a statement said,'on the basis of his wish to live outside the public eye.'

His mother Crown Princess Mette-Marit wrote also published an open letter on the court website,saying: 'Marius is,and will continue to be,a vital member of our family.'

'He has always had a public role that has been very difficult to define.'

'Unlike his siblings,he has no official duties. He won't have a public role and is not a public person.'

'Marius became a symbol for the unusual choice we made when we married.'

Marius was previously linked to heiress Linn Helena Nilsen,but the couple split in July 2017.

Royals