Quebec's financial market watchdog, the AMF, is filing charges against a former director of the Liberal party who was also head of the Metropolitan Transport Agency.

Joel Gauthier is accused of filing false financial reports in 2013 when he headed a group of investors who purchased the construction companies belonging to controversial businessman Tony Accurso.

The AMF claims Gauthier tried to mislead the financial regulators when the new consortium, named Hexagone, was investigated so it could be cleared for obtaining public contracts.

Gauthier was president of the provincial Liberal party from 1999 to 2003, and then led the AMT from 2003 until 2012.

Last year Gauthier resigned as a director for Hexagone.