Clashes broke out at May Day marches in Bolivia on Saturday over the government's proposed minimum wage increase.   
         
Union workers, angry that President Evo Morales' proposed 5 percent increase is too small, marched down the streets of the capital city of La Paz. Here they clashed with government supporters. 
           
The workers marched to the Labor Ministry where they threw red paint at the government building.
            
Morales suspended the country's official Workers' Day celebration after unions threatened to strike in protest of the government's proposal.         
   
Until now, unions have staunchly supported the leftist president who took office in January of 2006.
             
Clashes also erupted in the wealthy eastern city of Santa Cruz, an opposition stronghold. 
           
National strikes and widespread protests helped bring down previous Bolivian presidents, most recently Carlos Mesa in 2005 and Gonzalo Sanchez de Lozada in 2003.