Protesters enraged by the police's killing ofa teenager in Sao Paulo turned destructive.
Protesters looted and ransacked local storesand blocked traffic for hours when they torched two trucks and at least fivebuses on a major road.
At one point, a group of protesters highjacked one of the trucks and drove it on the highway at high speeds, localmedia said.
The demonstrators were reportedly protestingagainst the death of a 17-year-old boy who police said was shot in the chest"accidentally" Sunday.
Police said they were responding to adisturbance and said the shooting was unintentional.