New York, Berlin and London were among the cities which celebrated International World Pillow Fight Day at the weekend.  People took to the streets around the world on Saturday to mark the fourth such event, which was founded by the Urban Playground Movement.

Speaking during one such pillow battle, organiser Tom Grund told ITN: "No-one was volunteering for Hong Kong so I made a Facebook event inviting 100 friends and put it on a few other websites. I guess friends told friends and it went a bit crazy!"