The two-month old prince was admitted to the national hospital Rikshospitalet in Oslo on Tuesday afternoon, with a respiratory infection. The prince has problems taking nourishment.
"The prince must remain in hospital at least one more day," said palace information chief Astrid Versto. Versto could neither confirm nor deny that the prince was suffering from a viral infection.
Prince Sverre Magnus was also admitted to Rikshospitalet the previous week, with stomach trouble.
The prince, who was born on Dec. 3 last year, is to be christened in the palace chapel on March 4.
