The operation, dubbed Purification, began in the early hours of the day in Duque de Caxias, in the outskirts of Rio de Janeiro.
BBC: Latin America & Caribbean
2.
The police commander in Duque de Caxias, Claudio de Lucas Lima, has been sacked, but there is no indication that he was involved in the wrongdoing.
BBC: Latin America & Caribbean
3.
The case last September of a teacher from Rio's violent Duque de Caxias suburb who was stabbed after reprimanding pupils for drug-dealing was by no means exceptional.