"Propriety demands that Bansal should resign immediately as no fair probe is possible unless he resigns as Railway Minister," BJP Vice President Balbir Punj said here.
Punj also attacked Prime Minister Manmohan Singh for not asking his ministers Bansal and Ashwani Kumar to step down despite back-to-back allegations.
Name of Ashwani, who holds the Law portfolio, is embroiled in controversy over over his alleged interference in the preparation of the CBI status report in the coal scam.
