Delhi Chief Minister Arvind Kejriwal on Saturday asked Prime Minister Narendra Modi why beleaguered business tycoon Vijay Mallya was allowed to leave India."Since CBI directly reports to Prime Minister, Modi owes an answer why Mallya was allowed to leave India. Central Bureau of Investigation couldn't have allowed without approval from top," Kejriwal tweeted.Mallya left the country on March 2, days before a group of creditor-banks led by the State Bank of India moved the Supreme Court to restrain him from leaving India.A consortium of 17 banks led by the State Bank of India wants the liquor baron to be arrested for not repaying about Rs.9,000 crore he had borrowed.The United Breweries group chairman has said that he "respects and will comply with the law of the land".