Somaiya has also asked for a high level probe into the matter of what he said looks like a case of money laundering.
Somaiya, BJP's Scam Expose Committee convenor, presented documents that showed Anand Kumar, Mayawati's brother as the owner of a private airline - Indiana Air Pvt Ltd, registered in New Delhi.
"The aviation firm is a part of Anand Kumar group of companies, which include a consortium of some 300 fake firms," he alleged.
"Obviously, this is a fit case of money laundering. After all, who does all the money belong to? I am sure it is money looted from the state exchequer of Uttar Pradesh," Somaiya alleged.
"I have enough documentary evidence to substantiate my charges," Somaiya added.
The Mayawati government has till now not reacted on the allegation levelled against her brother and her.
According to Somaiya, her brother's airlines is 'directly linked to a web of companies owned by Anand Kumar and his wife Vichitra Lata, whose only child is known to be very close to Mayawati'.
Mayawati's brother's airlines is shown to be registered in 2010, while other companies are shown to be registered in 2011 in Mumbai. Among these were SDS Housing Pvt Ltd, SDS Farmlands Pvt Ltd, Frontage Investments, DKP Infrastructure Pvt Ltd, Agroba Savings Ltd and Ashish Construction Pvt Ltd.
"The glaring linkage between each of these different companies and Anand Kumar is established by the fact that most of the directors of the companies were common and they included either Anand Kumar or his wife," the BJP leader alleged.