Brazil authorities call for investigation after hundreds of police officers were deployed in response to the killing of an officer
Authorities in Brazil have called for an investigation after a police operation on the coast of São Paulo state left at least eight people dead, in an apparent act of retaliation.
About 600 police officers have been deployed across the Baixada Santista region in response to the killing of an officer by drug traffickers in the city of Guarujá last Thursday.
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