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One plant is also close to Paranagua, a key port in southern Brazil.

At the southern port of Paranagua in Parana state, a blockade on an access road that backed up trucks on Sunday night was lifted on Monday, according to a port agent and an association representing firms that operate at Paranagua.

Access to the port of Paranagua, one of the most important for Brazil’s grain exports, was no longer blocked on Thursday morning, authorities said.

Instead, goods are going overland to the Brazilian port of Paranagua and to granary ports on the edge of Paraguay's capital Asuncion.

At �ʲ������Բ�����á, Brazil's second-busiest port after Santos, nothing unusual has been reported related to the ongoing trucker protests, according to a press representative for the port.