COPENHAGEN — InvestigateWest photographer Christopher Crow had barely started shooting today, capturing the sprint of demonstrators who tried to break through police lines and storm the United Nations climate treaty talks, before he was arrested. Here are a few images he shot in those brief and chaotic moments:

A Danish police officer looks up after using his baton to drop a young woman demonstrator as she and others tried to break through police lines to enter the United Nations climate treaty negotiations. InvestigateWest photo by Christopher Crow.

Although police were using force, sometimes so were the demonstrators -- as in this shot, where a police officer is knocked to the ground by the protesters trying to rush the United Nations climate treaty meeting. InvestigateWest photo by Christopher Crow.

Police officer struggles to his feet after being overrun by demonstrators. InvestigateWest photo by Christopher Crow.