OSLO: The health of Norway’s 89-year-old King Harald V, in hospital due to complications from a blood condition, has “deteriorated” over the weekend, a statement from the palace said Sunday.

Europe’s oldest reigning monarch is being treated for haemolytic anaemia, a condition caused by an abnormally rapid destruction of red blood cells which leads to fatigue, paleness and shortness of breath.

“His Majesty the King’s health deteriorated over the weekend,” said the palace.

“The King is receiving antibiotics for a bacterial infection in his blood and has responded to this treatment,” the statement added.

He was admitted to Oslo University Hospital on Monday due to fluid retention from the cortisone treatment he is receiving and placed on sick leave for two weeks.