BySiladitya Ray,

Forbes Staff.

British authorities arrested four people after videos and images of President Donald Trump alongside convicted sex offender Jeffrey Epstein were projected onto on Windsor Castle on Tuesday night, a short while after the president arrived in the U.K. for a state visit, during which he is scheduled to stay at the royal residence.

The British political activist group, Led By Donkeys, appeared to take credit as they shared a photo of the projection on the walls of the British monarch’s royal residence on Instagram, followed by the caption: “Hey Donald, welcome to Windsor Castle.”

The projections showed old videos of Trump’s interactions with Epstein and photos of an alleged inscription signed by the president, which read “To Jeff — You are the greatest!”