Buckingham Palace said that Charles experienced “temporary side effects” following treatment on Thursday and was taken to the hospital for observation before returning to his London residence.

King Charles III was briefly hospitalized Thursday amid ongoing medical treatment for cancer, according to Buckingham Palace. Charles' hospitalization was a result of "temporary side effects" he experienced after undergoing what the palace described as "scheduled and ongoing medical treatment for cancer" on Thursday morning.

Buckingham Palace says King Charles III was hospitalized for observation on Thursday after experiencing “temporary side effects,’’ related to a scheduled cancer treatment.