King Charles III experienced temporary side effects of his continuous cancer treatment that required a short stay in the hospital for observation on Thursday morning, said Buckingham Palace in a statement.
“After the planned and continuous medical treatment for cancer this morning, the king experienced temporary side effects that required a short period of observation in the hospital,” said the palace.

King Charles III had a short stay in the hospital because of his cancer treatment. He has now returned to Clarence House. (Dan Kitwood/Getty images)
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The explanation added: “The afternoon assignments of his Majesty were therefore postponed. His Majesty has now returned to Clarence House and as a precautionary measure the diary program of Tomorrow will also be moved. His Majesty wants to send his apologies to all those who can be unhearded or disappointed as an result.”