MUMBAI- An Indian financial crime-fighting agency said on Thursday it has seized a Rolls-Royce Ghost, a Porsche Panamera and some half a dozen more luxury vehicles belonging to billionaire jeweller Nirav Modi and his firms, in a probe into an alleged $1.8 billion fraud against state-run Punjab National Bank PNBK.NS .

Modi, his companies, and other firms with links to his uncle Mehul Choksi, are at the heart of the alleged fraud that involved illegally issued letters of undertaking (LOUs) from the second-largest Indian state-run lender that were used to get loans from overseas branches of other, mostly Indian banks.

In what has been dubbed the biggest fraud in India's banking history, police have so far arrested a dozen people - six from the bank and six more from Modi and Choksi's companies - as they continue the probe.

A lawyer for Modi has denied his client was involved in any fraud. Choksi has not commented but his firm, Gitanjali Gems GTGM.NS , has also denied involvement in the alleged fraud.

The Enforcement Directorate (ED), an Indian agency focused on foreign exchange and money laundering offences, has been conducting separate searches at homes and offices of Modi. As of last Saturday, it had seized jewellery, gold, diamonds, precious metals and stones that it said were worth 56.74 billion rupees ($872.5 million).

In a Twitter post on Thursday, the ED detailed the seizures of the cars from Modi and his companies. It also said it had frozen shares and mutual funds worth 78 million rupees held by Modi and 867.2 million rupees by Choksi.

Modi, who police say left India with his family in January, before the bank filed a police complaint triggering an inquiry, has not publicly commented on the case yet.

However, in a letter to PNB, a copy of which was seen by Reuters, Modi had said that his companies owed the bank less than 50 billion rupees, well below the amount alleged by the bank. He also said PNB had jeopardized its prospects of recovering the sums owed by going public with its allegations.



PNB responded to Modi's letter on Thursday.

In its letter of reply, seen by Reuters, the bank said the LoUs in question were illegally obtained by Modi's firms and it was compelled by law to report it to law enforcement agencies, as they were potential violations of money laundering laws and the Foreign Exchange Management Act.

It urged Modi to respond with a "concrete and implementable" repayment plan on outstanding dues.

Earlier on Thursday, Reuters reported that PNB had stepped up its controls on the use of global interbank payments network SWIFT in the aftermath of the fraud.

Separately, on Thursday, responding to clarifications sought by the stock exchange, PNB in a regulatory filing said it had followed all "lawful avenues available" to recover its dues.

The bank reiterated that it had enough assets and capital to meet any liabilities from the fraud.

In a note issued late on Wednesday, Goldman Sachs trimmed its earnings estimates for the top three Indian state-run banks, including PNB, saying recent capital injections announced by the government would dilute earnings.

It cut PNB's earnings estimate by nearly 30 percent for the current fiscal year ending March 31, saying it expected a larger earnings slide in PNB's case due to the fraud-related liability.

PNB shares fell 2.3 percent on Thursday. The stock has lost more than a quarter of its market value since disclosing the $1.8 billion fraud on Feb. 14.

Gitanjali Gems fell almost 5 percent, its maximum daily limit, to all-time lows.

(Reporting by Devidutta Tripathy; Writing by Euan Rocha; Editing by Alex Richardson) ((; +91 22 6180 7257; Reuters Messaging: