Even as a larger Supreme Court bench began hearing Yakub Memon's petition challenging his death warrant, the Mumbai serial blasts convict also filed a fresh mercy plea with President Pranab Mukherjee on Wednesday, a day before he is scheduled to hang in a Nagpur jail. His earlier mercy petition was rejected by the President in April last year.br On Tuesday, Memon's hanging split a two-judge bench and forced Chief Justice of India HL Dattu to constitute a larger bench which is currently hearing the petition. Memon has argued that the death warrant against him was issued even before the Supreme Court could hear his curative petition.