Olympics: Foreign media jostled by police in Beijing

Police prevent media from filming the aftermath of a demonstration by Free Tibet activists outside Beijing's Ethnic Minorities Park, close to the main Olympic area earlier today, August 13 Photograph: Dan Chung/Guardian

Although China has repeatedly pledged to allow the foreign media the freedom to do their work during the Olympic Games, the police are wary of photographers Photograph: Dan Chung/Guardian

Police forcibly remove one of several Free Tibet protesters Photograph: Tania Branigan/Guardian

Many cameras are present but this does not stop officers from getting heavy handed Photograph: Dan Chung/Guardian

A TV camera is targeted by police Photograph: Dan Chung/Guardian

A park warden forcibly removes a cameraman as police cordon off the demonstration Photograph: Tania Branigan/Guardian

A man is taken away in a police car Photograph: Dan Chung/Guardian

ITN correspondent John Ray, who was dragged along the ground and detained in a nearby restaurant for 20 minutes. 'This was an assault in my mind, I am incredibly angry about this,' Ray told AFP minutes after he was released Photograph: Dan Chung/Guardian

John Ray is driven away in a police van Photograph: Tania Branigan/Guardian

Guardian photographer Dan Chung is hassled by Beijing police Photograph: David Bebber/Guardian

Chung has now attracted the attention of several officers Photograph: David Bebber/Guardian

Chung stops police from grabbing his camera Photograph: David Bebber/Guardian

Chung evades the police Photograph: David Bebber/Guardian