This weekend 's operation , which culminated with the raising of a Brazilian flag Sunday morning in the Caixa d'Agua section of the city , was conducted by about 750 military police personnel . 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 . Comment: Rio de Janeiro is a host city for the 2014 World Cup and the 2016 summer Olympics .