There are no exchanges of gunfire , an official says , in contrast with late last year . Comment: Rio de Janeiro is a host city for the 2014 World Cup and the 2016 summer Olympics .
There are no exchanges of gunfire , an official says , in contrast with late last year . Authorities arrested 3 and seized 32 vehicles and 300 bundles of marijuana . Rio de Janeiro is a host city for the 2014 World Cup and the 2016 summer Olympics .