Mumbai: In a bid to make stronger the evidence to extradite fugitive liquor tycoon Vijay Mallya, the Central Bureau of Investigation and the Enforcement Directorate are getting ready a charge sheet alleging he laundered a major amount of the Rs 6,000 crore bank loans taken for Kingfisher Airlines.

A report in The Times of India said on Monday that the money was diverted through shell companies in seven countries, including the US, the UK, France and Ireland.

"Letters rogatory have already been sent to the US, the UK, France and Ireland and we will obtain complete details soon," an official has been quoted as saying in the report. The official has claimed that the agencies have been able to set up the links between the shell companies and bank accounts in the seven countries.

Explaining the organized way in which Mallya deceived the banks, the official said he used to pay back some part of the loan to the banks to gain their confidence to get more funds from them.

The latest evidence will be submitted before the London court where the final extradition hearing will take place in December. At present, in front of the UK court, the agencies have presented the charge s in the nearly Rs 900 crore IDBI Bank loan default case.

Earlier, in a charge sheet filed in June, the ED had alleged that Mallya had laundered amount worth Rs 1,300 crore through 13 shell companies, which he has deprived of. Mallya has maintained that he has not done anything wrong and huge dues to the banks have been due to the collapse of the business.

The ED had also said that these shell companies had no actual activities and was completely controlled by Mallya with former employees of UB group being its directors.