Demonstrators angry with the billions being spent on Brazil's hosting the World Cup burst into the hall where the tournament trophy was on display on Tuesday.
The trophy is on a tour around the host country ahead of football's main event, set to open June 12 and run through July 13.
Protestors -- who oppose the money being spent on organizing the Cup, as well as recent public transport increases -- hurled rocks and chunks of wood at the historic building in Belem, the Para state capital, where the trophy was on display, according to O Estado de Sao Paulo newspaper.
Organizers called off the viewing and whisked out the golden trophy, without further incident, the daily said.
The trophy was to continue on to its showing in Teresina, Piuai state.
Brazil has faced a series of protests and strikes for better pay and working conditions in the run-up to the World Cup and elections scheduled for October.