New Delhi, April 28: The Congress on Saturday called Minister of Railways and Coal Piyush Goyal’s alleged sale of shares held in a privately-held company at nearly 1,000 times the face value as a “murky saga” of “gratification, gross impropriety and conflict of interest”. The Bhartiya Janata Party quickly came to the defence of its minister saying it was an attempt by the Congress party to attack Goyal based on “baseless, malicious and incorrect” accusations. The Congress party has sought Goyal’s removal and a “comprehensive, independent investigation” into the matter.