The Congress leaders met ahead of an all-party meeting called by the government and another of opposition.
Sources said during the meeting chaired by the Congress president Sonia Gandhi, top party leaders were of the view that implementation of demonetisation move along with its alleged leakage to BJP should be questioned in both houses of Parliament.
Congress leaders had yesterday alleged that prior information of demonetisation was given by the Prime Minister to his own party leaders and termed it as a "scam".
A meeting of many opposition parties with Congress leaders is slated today.
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Among other issues on which Congress has sought discussion are OROP, the situation in Jammu and Kashmir and plight of farmers, besides proposed merger of Railway and Union budgets.
Former Prime Minister Manmohan Singh, Congress Vice President Rahul Gandhi along with top party leaders AK Antony, Ahmed Patel, Gulam Nabi Azad, Mallikarjun Kharge, Anand Sharma, Jairam Ramesh and Satyavrat Chaturvedi attended the meeting.
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