(Bloomberg) -- Brazil’s congressional heads denied involvement in the country’s largest corruption scandal after being named among dozens of politicians for investigation.

Renan Calheiros and Eduardo Cunha, the heads of the Senate and lower house respectively, and Rio de Janeiro Senator Lindbergh Farias all rejected allegations of graft in the kickback scheme dubbed Carwash. Farias told the Folha de Sao Paulo newspaper in an interview published Sunday that while he may have acted improperly, his actions weren’t illegal. The senator said he took a 2 million real-donation ($650,000) from Andrade Gutierrez SA, a Rio-based construction company.

Reprinted courtesy of Bloomberg reporters Raymond Colitt, Anna Edgerton and Sabrina Valle
Mr. Colitt may be contacted at rcolitt@bloomberg.net
Ms. Edgerton may be contacted at aedgerton@bloomberg.net
Ms. Valle may be contacted at svalle@bloomberg.net