King Charles III was diagnosed with a form of cancer and began treatment, Buckingham Palace says. The 75-year-old monarch's illness was announced by Buckingham Palace to "avoid speculation" Princess of Wales Kate, 42, was hospitalized more than two weeks ago to undergo abdominal surgery, the details of which have not been made public.

The announcement of Charles III's cancer adds to a particularly difficult start to the year for the British royal family, after the operation of Princess Catherine, who will be at rest at least until Easter.