King Harald of Norway has been hospitalised with a fever, the country’s royal household said in a statement this afternoon.
The monarch and three-time Olympian, 85, is in a stable condition at Oslo University Hospital Rikshospitalet, it added.
Harald V has ruled the Scandinavian country since January 1991, succeeding his father, Olav V.
Harald sailed with a crew of six others in a Swiss sailing event just last week on family boat Sira, built by his Olympic gold medalist father in the 1930s.
The monarch participated in the 1964, 1968 and 1972 Olympics, representing Norway in yachting events.
King Harald (right) is pictured with Queen Sonja (left) at a museum in Oslo on June 16, 2022
King Harald is pictured in November with Dutch king Willem-Alexander for an official portrait
He never medalled.
Harald underwent a leg operation in January, a month before his 85th birthday, but insisted on taking part in the Sailing World Cup.
He finished in an impressive tenth place.
Event committee chair Jean Olivier Kerr said: ‘He really gave the younger sailors tough competition. It was fun to watch.
‘He has a strong competitive instinct. He is not here just to enjoy himself and have fun.’
Harald, who walks accompanied by a bodyguard in June, was taken to Oslo University Hospital
Harald’s relationship with Queen Sonja was initially controversial as she was a commoner born to a humble clothing saleswoman.
They married in 1968 despite some public opposition.
They have two children, with son Haakon, 49, the Crown Prince and heir apparent.
Their daughter is Princess Märtha Louise of Norway, 50.
The king (centre) sits on the throne, flanked by Queen Sonja and Crown Prince Haakon