Norway's King Harald, 89, in 'extremely serious' condition: palace

Norway's 89-year-old King Harald, hospitalised with a blood disease, is in an "exremely serious" condition, the royal palace said Thursday.

Europe's oldest reigning monarch has been in hospital in Oslo since Monday suffering from haemolytic anaemia, a condition caused by an abnormally rapid destruction of red blood cells which leads to fatigue and shortness of breath.