Argentina, Paraguay and Uruguay have agreed on 12 cities where they want to host the centenary World Cup in 2030, according to Sky Sports.
The Argentine Football Association said the plan would grant eight cities to Argentina and two each for Paraguay and Uruguay. The names of the cities were not disclosed.
Bidding is not due to open for another four years but leaders of all three national bodies say they want to make a joint bid.
The South American nations are expected to face tough competition for the hosting rights of a tournament that will likely feature 48 teams.
Uruguay staged the first World Cup in 1930 and has long been expected to seek hosting rights with Argentina. Paraguay later joined the initiative.
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