Bhushan Power & Steel is one of India's most indebted companies

The Allahabad Bank on Saturday became the second state-owned bank to report a major alleged fraud by bankrupt steelmaker Bhushan Power & Steel Ltd this month, adding to concerns about a banking industry burdened with bad debts.

Allahabad Bank said in a statement that it had told the Reserve Bank of India (RBI) that it had identified a fraud worth Rs 1,775 crore ($259 million) in Bhushan's accounts.

On July 6, state-run Punjab National Bank (PNB) said it had reported an alleged fraud of $554.6 million in the steelmaker's accounts.

"It has been observed that the company has misappropriated bank funds, manipulated books of accounts to raise funds from consortium lender banks," Allahabad Bank said in its statement, adding that it had made provisions of about $131 million against the bank's exposure.

Bhushan Power & Steel, one of India's most indebted companies, was among the first 12 companies referred by the RBI to a bankruptcy court for a debt resolution process under the new insolvency law.

Prime Minister Narendra Modi's government introduced new bankruptcy resolution rules in 2016 to help with faster resolution of bad loans, but litigation has tied down some big restructuring deals.

To revive the banking sector the government has injected about $36 billion of taxpayers' money into the banks in the past five years and initiated an asset quality review by the central bank.

Only about 5 per cent of the stressed assets of banks have so far been dealt with through the bankruptcy process.

Bhushan Power & Steel could not be immediately reached for comment on the latest allegation.