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The federal police announced back in October that it would investigate public concession contracts in the energy, airports, roads and sanitation sectors involving companies linked to the case.
Engevix, which formed the Inframérica consortium with Argentina's Corporación América, holds two airport operating contracts: the 4.5bn reais Brasília airport concession and the 650mn São Gonçalo do Amarante airport concession near Rio Grande do Norte state capital Natal.
The Aeroportos do Futuro consortium - comprising Odebrecht TransPort of the Odebrecht group and Singapore's airport operator Changi - holds a 19bn reais contract to operate Galeão airport in Rio de Janeiro.
And UTC, through its Aeroportos Brasil consortium with tollroad operator Triunfo Participações (TPI) and France's Egis Airport Operation, jointly holds a 3.8bn-real contract to operate Viracopos airport in São Paulo state's Campinas city.