LONDON Thousands of anti-racism campaigners around the world staged demonstrations on Sunday, acting in solidarity with Americans protesting police violence after George Floyd, a Black man, died after a white police officer kneeled on his neck for nearly nine minutes last week.

Demonstrators in London marched across the city after gathering in Trafalgar Square, where they kneeled en masse in honor of Floyd, before heading across the River Thames to protest near the U.S. embassy in the Battersea neighborhood.

Onlookers cheered and drivers honked horns from passing cars as the protesters chanted say his name and Black lives matter. At one point, four men climbed on top of a bus stop to lead the chants, before getting down on one knee in silence and encouraging the others to do the same.