Swiss police may have played a key role in uncovering the alleged bribery of officials involved in the awarding of the contract for the MUHC superhospital, according to reports.

In an affidavit obtained by La Presse, Swiss police were shown to be already investigating construction firm SNC-Lavalin employee Riadh Ben Aissa.

In the course of that investigation, the police uncovered the alleged conspiracy and passed the information on to the RCMP in 2012.

Quebec anti-corruption police taskforce UPAC then carried out raids at the MUHC and SNC-Lavalin offices.

Those raids led to the arrest of three employees at the construction firm.