Authorities were on alert after suspected gang members torched three buses and shot at police, raising concerns the violence could mushroom into a repeat of last year’s huge crime wave, officials said Wednesday. No one was hurt in Tuesday night’s attacks but authorities were investigating whether the violence was orchestrated by the prison-based First Capital Command gang, or PCC, whose assaults on police, banks and buses last year left more than 200 people dead in South America’s largest city. Full Story