Charles' office, Clarence House, confirmed that "their royal highnesses' car was attacked by protesters on the way to their engagement at the London Palladium this evening, but their royal highnesses are unharmed."
The couple arrived looking composed at the theater, where they were attending a Royal Variety Performance.
Protesters angry at a huge tuition fee hike are fighting with police and smashing windows in London, after legislators in the House of Commons approved a plan to triple university fees to 9,000 pounds ($14,000) a year.
Thousands of students staged a peaceful protest but a minority turned violent, hurling sticks and rocks at riot police, smashing store windows and setting on fire a giant Christmas tree in Trafalgar Square.
