In the state of Michoacán that same week, gangsters burned several buses and engaged in gun battles with the Mexican authorities.

They burned buses during the morning rush hour.

During the 2003 Carnival, the army was called in to help the police after drug gangs burned buses, threw explosives and shut down parts of the city.

Some of them, the police said, burned buses and cars.

Survivors of an ambush on a convoy said rebels burned buses that were crowded with passengers, the national press agency reported today.

More recently, they have burned buses, ambushed police units and bombed electrical installations in the capital.

The violence spread as the battling groups burned more buses and fired guns at each other around this city of half a million people, the witnesses added.

Gang members also burned buses, paralyzing public transport.

Supporters from his Congress Party burned buses, cars and shops and attacked police stations.

Smoke arose from at least four areas of the city, as rioters burned cars, buses and trucks.