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Violence erupts as protesting Colombia farmers march on Bogota

John Vizcaino / Reuters

Student demonstrators take part in a protest against agricultural and trade policies in Bogota, Colombia, on Aug. 29, 2013.

Guillermo Legaria / AFP - Getty Images

A demonstrator confronts riot police officers during clashes which erupted in Bogota on Aug. 29.

Thousands of Colombian farmers and state workers marched through Bogota on Thursday, banging pots and pans as they converged on the capital after 11 days of increasingly violent protests against agricultural and trade policies they say have left them impoverished.

Students wearing balaclavas pelted shop windows with rocks near the capital's main square and clashed with riot police who fired tear gas to disperse them. Bogota imposed a curfew in three of the more populated areas of the city after violence continued into the night.

"Long live the farmers' strike! Food sovereignty," protesters chanted as they waved anti-government banners. Read the full story.

Jose Miguel Gomez / Reuters

Student demonstrators throw stones at riot police in Bogota on Aug. 29.

Fernando Vergara / AP

A line of riot police officers, left, charge on demonstrators as a riot police officer, right, raises his baton over a protester falling to the ground, in downtown Bogota on Aug. 29.

Eitan Abramovich / AFP - Getty Images

Farmers hurl stones at riot police during clashes at a road blockade in La Calera, Cundinamarca department, on Aug. 23.

Fernando Vergara / AP

A riot police officer kicks a protester as another, center, tries to protect him during protests in Ubate, north of Bogota, on Aug. 26.

Fernando Vergara / AP

A riot police officer detains a bleeding protester in Ubate on Aug. 26.

Fernando Vergara / AP

Protesters throw stones at a police vehicle in Ubate on Aug. 26. Hundreds of protesters clashed with police in support of farmers who had being blockading highways for a week for an assortment of demands that include reduced gasoline prices, increased subsidies and the cancellation of free trade agreements.