Police bases set on fire in Rio favela attacks
21 March 2014 Last updated at 21:33 GMT
At least three police posts have been attacked by suspected criminals in Rio de Janeiro's shanty towns.
Cars and metal containers used as bases by so-called Pacifying Police Units - or UPPs - were set on fire in a challenge to the security policy which aims to drive out drug gangs from Rio's favelas ahead of the upcoming World Cup.
Julia Carneiro reports.