Palace slams paparazzi for harassment of Prince George. The Royals are taking a stand against paparazzi again.

In a letter Friday, Jason Knauf, Kensington Palace's communications secretary, urged media organizations not to run unauthorized photos of Prince George and Princess Charlotte, arguing that paparazzi are using increasingly dangerous methods to get their shots. The letter listed a number of alarming tactics that paparazzi have used recently including: hiding in car trunks, hiding in sand dunes, and using other children to draw Prince George into view on playgrounds and more.

The letter says these tactics present a risk in a "heightened security environment," and that a line has been crossed.

"The worry is that it will not always be possible to quickly distinguish between someone taking photos and someone intending to do more immediate harm," Knauf said.