There are no reports of gunfire , an unusual observation , in comparison with late last year . Brazilian intelligence agents and marines also played a role , with 14 armored vehicles , five helicopters and GPS units all used as part of the operation , Agencia Brasil reported . 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 .
There are no reports of gunfire , an unusual observation , in comparison 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 .