Mr Khan is alleged to have stashed a huge amount of black money abroad, including over US$ 8 billion in the Union Bank of Switzerland (UBS) in Zurich.

Khan’s lawyer IP Bagaria confirmed the development. “The ED has filed the charge-sheet against Khan and Tapuriah under the Prevention of Money Laundering Act,” he said.

Khan is also under the scanner for terror links as he is suspected to have laundered money of international arms trader Adnan Khashoggi, who is said to be associated with terrorist outfits.

There have been allegations against the stud farm owner of money laundering, engaging in hawala operations, transferring cash and valuable assets outside the country by unlawful means with the help of foreign nationals and forgery. He has also been accused of obtaining passports from Mumbai and Patna using forged documents.

Puducherry Governor Iqbal Singh was questioned by the Enforcement Directorate for helping Mr Khan in securing the travel document from the regional passport office in Patna through a Bihar Congress politician, Mr Amlendu Kumar Pandey, who is also under investigation.

Khan was arrested in Mumbai on 7 March after several hours of grilling in the wake of the Supreme Court’s criticism of the government over its inaction against the black money hoarders, particularly the stud farm owner. The arrest of Mr Tapuriah, a Kolkata businessman, followed soon. Both are in judicial custody in Mumbai.
Khan is also under the scanner for terror links as he is suspected to have laundered money of international arms trader Adnan Khashoggi, who is said to be associated with terrorist outfits.