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Masked gunmen killed 11 people indiscriminately after bursting into a bar in the northern Brazilian city of Belém on Sunday.
The shooting happened in Guamá, a poor and violent neighbourhood of the city in the Amazon region.
Local media speculated that the shooting was carried out by a gang in retaliation for the deployment in March of federal forces to Belém.
So far, no arrests have been made in connection with the crime. Read more