A fan poses outside of the building where Brazil announced its World Cup roster as part of a protest on Wednesday.

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RIO DE JANEIRO (AP) - Federal police in Brazil are threatening a nationwide strike during the month-long World Cup if the government doesn't increase their pay and improve working conditions.

Officers staged a protest rally Wednesday outside the Rio de Janeiro concert hall where national team coach Luiz Felipe Scolari was announcing his roster for the soccer tournament.

CREDITOR: Scolari announces Brazil's World Cup roster

Protesters carried a life-size inflatable white elephant to complain about the high costs that the World Cup has brought to a country still struggling with deficient public services.

At Copacabana Beach, other protesters lined up soccer balls with red crosses on the sand, showing photos of victims who have been killed or injured in gunfights in the city's supposedly ''pacified'' slums.

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