More than 30 people were injured during a melee Monday between protesters and police who fired tear gas into the crowd.
Leading the demonstrations over the last few weeks was losing candidate Andres Manuel Lopez Obrador, who lost by 240,000 votes to Felipe Calderon. A partial recount has indicated little change in the overall figure
The leftist Lopez Obrador maintains that the election was stolen by the center-right Calderon, who hails from the same party as current President Vicente Fox.
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