Danish prince visits ailing father

Denmark's Crown Prince Frederik has returned from the Winter Olympics in South Korea to visit his ailing father at a Copenhagen hospital.

The royal household says Frederik, the heir to Denmark's throne, was joined by his mother, Queen Margrethe, and his Australian wife Princess Mary during the visit late on Friday.

The queen's French-born husband, 83-year-old Prince Henrik, was hospitalised with a lung infection on January 28. Last year, the palace announced Henrik was suffering from dementia.

The palace said on Friday that Frederik, an International Olympic Committee member, left the Winter Games in Pyeongchang because his father's condition had "seriously worsened."