King Charles needs to have a “short” observation at the hospital Thursday after scheduled cancer treatment

King Charles was hospitalized Thursday for scheduled cancer treatment after experiencing “temporary side effects.” Buckingham Palace said in a statement.

His participation on Thursday afternoon and Friday was cancelled.

“Je’s downtown has now returned to the Clarence House as a precautionary measure, and tomorrow’s diary plan will be rescheduled as well,” the palace said.

“Under je, I want to apologize to all those who may be inconvenient or disappointed.”

Charles, 76, has been under treatment for the undisclosed form of cancer for more than a year. The king continued to perform his state duties, even though he spent some time on public duties.