An indigenous woman and her child who participated in the TIPNIS protest march are seen arrested by riot police in Yucumo September 25, 2011. The Amazonian ethnic groups which live in the Isiboro Secure territory, known by its Spanish acronym TIPNIS, are completing a 370 miles (595 km) march from Trinidad, in the northern Beni province, to La Paz to protest against a projected 185 mile (298 km) long highway that bisects the protected park in the Amazon forest. Bolivian riot policemen intervened the protest using tear gas canisters and detained all of the protesters. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST POLITICS ENVIRONMENT)