Prince Charles, the heir to the British throne, has tested positive for the new coronavirus.
The prince's Clarence House office says the 71-year-old is showing mild symptoms of COVID-19 and is self-isolating at a royal estate in Scotland.
It says his wife Camilla has tested negative. "The Duchess of Cornwall has also been tested but does not have the virus," Clarence House said.
The palace says Charles "has been displaying mild symptoms but otherwise remains in good health and has been working from home throughout the last few days as usual."
The tests were carried out by the National Health Service in Scotland.
"It is not possible to ascertain from whom the Prince caught the virus owing to the high number of engagements he carried out in his public role during recent weeks."
Buckingham Palace said Queen Elizabeth II remains at her home in Windsor.
He last saw the 93-year-old monarch on the morning of March 12 following an investiture, before the earliest time he would have been infectious.
Queen Elizabeth left London for Windsor Castle on March 19. She is with her 98-year-old husband, Philip.
"Her Majesty The Queen remains in good health," Buckingham Palace said. "The Queen last saw The Prince of Wales briefly after the investiture on the morning of 12th March and is following all the appropriate advice with regard to her welfare."