Watch | British royals tell paparazzi, media - Back off Prince George

In a letter issued from Kensington Palace on Friday, the Duke and Duchess of Cambridge expressed concern that members of the news media were going to increasing extremes to photograph their 2-year-old son, Prince George. The letter, sent on behalf of Prince William and his wife, details episodes of photographers' using other children to attract Prince George on playgrounds; tracking the movements of a nanny and other household staff; and hiding in sand dunes to take photos of the child playing on the beach with his grandmother. The palace said that the tactics had made it more difficult to distinguish a slinking photographer from someone who might wish to do harm. The palace added that it would continue to pursue legal action against those who interfered with its privacy.