A large demonstration has begun in the Sao Paulo's streets in support of a metro strike and against the hosting of the World Cup in Brazil.
Witnesses have begun live tweeting images of the protests, which come three days before the tournament starts:
MTST se une ao ato de apoio aos metroviários nas ruas de SP. Milhares de pessoas em marcha! http://t.co/nrRJjau4os
Now: Police in front of São Paulo state secretary of transportation office. Protesters in front. peaceful. http://t.co/NkF84XbQRQ
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