Norway's King Harald has been admitted to a hospital for treatment in connection with a blood disease, the royal palace said, reports infohub.kz.
Harald, who is 89, was admitted to the National Hospital on Monday afternoon, the palace said in a statement.
The palace said the king has been treated with cortisone for the blood disease hemolytic anemia in recent weeks. This has led to fluid accumulation in the body that requires treatment in hospital.
The statement pointed out that the king has been on sick leave for two weeks. During this period, his son, Crown Prince Haakon, is regent and performs the duties of head of state.
Harald has been in and out of the hospital several times in recent years. In February, he was admitted to a hospital in Spain's Canary Islands during a winter vacation, where he was treated for a skin infection.
Two years ago, the king fell ill during a private vacation with the queen in Malaysia and received a temporary pacemaker there. He was returned to Norway aboard a medical airplane, where he was fitted with a permanent pacemaker.
Harald has been Norway's monarch since 1991.