In his first statement since being diagnosed with cancer, Britain's King Charles III on Saturday thanked well-wishers in a note posted on the monarch's website and the royal family's official page on social media platform X, formerly known as Twitter.

Axar.az reports that Buckingham Palace announced on Monday that 75-year-old Charles has been diagnosed with a form of cancer and that he would be postponing some engagements to undergo treatment.

"I would like to express my most heartfelt thanks for the many messages of support and good wishes I have received in recent days," Charles said in a statement.

The diagnosis comes just 17 months into Charles' reign, following the death of his 96-year-old mother, Queen Elizabeth II, in September 2022.