Several hundred masked protesters clashed with police, attacked shops and occupied a top store in London after hundreds of thousands of people rallied against government austerity measures. Clad in black and covering their faces with scarves, the protesters clashed with police, hurling fireworks, petrol bombs and paint. Clothes store Topshop and bank HSBC had their windows smashed, while some protesters hurled missiles at London's landmark Ritz Hotel. Others lit a bonfire at Oxford Circus, in the heart of the shopping district.
Riot cops, bagpipers, steel bands, choirs and dancers were also out for the event.
Watch a video of the event: