(??The Vatican flag outside the Holy See's nunciature, or embassy, in Washington, 26 January 2012. REUTERS/?Yuri Gripas)

The Vatican was shaken by a corruption scandal Thursday after an Italian television investigation said a former top official had been transferred against his will after complaining about irregularities in awarding contracts.

The show “The Untouchables” on the respected private television network La 7 Wednesday night showed what it said were several letters that Archbishop Carlo Maria Vigano, who was then deputy-governor of Vatican City, sent to superiors, including Pope Benedict, in 2011 about the corruption.

The Vatican issued a statement Thursday criticizing the “methods” used in the journalistic investigation. But it confirmed that the letters were authentic by expressing “sadness over the publication of reserved documents.”

As deputy governor of the Vatican City for two years from 2009 to 2011, Vigano was the number two official in a department responsible for maintaining the tiny city-state’s gardens, buildings, streets, museums and other infrastructure.