Congress leader and former home minister Ramesh Chennithala said the party cannot merely dismiss the issue holding that they have nothing to do with it.
"People of the state have the right to know the source of income for Binoy to carry out business worth crores of rupees in Dubai', he said.
Referring to statements of CPI(M) and party state secretary Kodiyeri Balakrishnan that there was no case pending against Binoy in Dubai, he said the party would not be able to cover up the issue with this kind of statement.
BJP National Executive member V Muraleedharan in an open letter to CPI-M General Secretary Sitaram Yechury asked whether he would order an enquiry.
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According to acomplaint by Dubai-based JAAS Tourism company, Binoy, the elder son of Balakrishnan, allegedly cheated the firm of Rs 13 crore.
The party said it was a "political conspiracy" to use the financial dispute between two persons, if any, as a stick to beat the CPI-M.
The CPI(M) also said no case was pending against Binoy, who was working in Dubai for the past 15 years.
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