Three dead in the shooting of an anti-drug operation in Rio de Janeiro

• Brazil Lula da Silva rises in the polls and is close to victory in the first round

A police operation against drug gangs in Rio de Janeiro

and disrupted traffic on the city's main thoroughfares, forcing passengers out of their cars and onto the ground to

The raid by the military police of Rio de Janeiro has begun at dawn in the

.

This favela is located in an important communications hub that connects the city with the international airport.

Aerial footage broadcast by Brazil's Record television network showed

and running through stopped traffic while passengers hid behind cars and buses.

Traffic has now resumed. The police operation came six days before the first round of

and highlights the security challenges facing many capitals.

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