Lionel Messi and company were escorted from the airport Monday to the team's hotel by a fleet of military and federal police cars, private security vehicles and ambulances, reports Xinhua.
The team will be based at the Cidade do Galo training centre belonging to Atletico Mineiro, the club of Messi's former Barcelona teammate Ronaldinho.
The squad is expected to train for the first time Tuesday and will hold an open training session for 4,000 fans Wednesday.
Alejandro Sabella's team will begin their World Cup Group F campaign against Bosnia and Herzegovina at Rio de Janeiro's Maracana stadium June 15.
That clash will be followed by matches against Iran June 21 and Nigeria June 25.