Investigators also searched and made seizures at the suspect’s home, she said in the afternoon.
An arrest last summer
Borg Hoiby was arrested on August 4 following a nighttime argument in a woman’s apartment in Oslo and accused of causing bodily harm to the resident, with whom he was in a relationship.
Norwegian media reported that police found a knife stuck in one of the walls of the woman’s bedroom at the time.
He was then arrested again in September for violating a protection order.
Son of Norwegian Crown Prince’s wife arrested on suspicion of assault
Police say when he was arrested Monday, he was in a car with the alleged victim from the August incident.
On Tuesday, police also said suspicions relating to the first incident now included domestic violence.
No decision has yet been taken, according to the police, concerning a possible placement in pre-trial detention.
Hoiby and his half-siblings – 20-year-old Princess Ingrid Alexandra and 18-year-old Prince Sverre Magnus – were raised together by Mette-Marit and Haakon.
Unlike them, he has no official public role.
