The whistleblower who revealed alleged money laundering involving Danske Bank said on Monday that a major European bank helped process up to 150 billion US dollars in suspicious payments, or nearly two-thirds of the transactions under scrutiny.

Howard Wilkinson, who was head of Danske Bank's trading unit in the Baltics from 2007 to 2014, did not name the bank, but a source with direct knowledge of the case said he was referring to Deutsche Bank, which was one of the lenders clearing dollar transactions for Danske's Estonian branch.

A Deutsche Bank spokesman confirmed in a statement to Reuters the lender acted as a correspondent bank for Danske in Estonia.

“Our role was to process payments for Danske Bank. We terminated the relationship in 2015 after identifying suspicious activity,” the spokesman said.

Wilkinson said two U.S. banks were also involved in handling dollar payments for Danske in Estonia, without identifying them. Alongside Deutsche, JPMorgan and Bank of America cleared dollar transactions for Danske's Estonian branch, sources have told Reuters.

JPMorgan ended the correspondent banking relationship with Danske in 2013 on grounds that transactions did not comply with anti-money laundering rules, according to a person familiar with the matter.

Bank of America declined to comment.

Authorities in Denmark, Estonia, Britain and the United States are investigating payments totaling 200 billion euros (228.5 billion US dollars) made through Danske Bank's tiny Estonian branch between 2007 and 2015 in a growing global scandal.

“I would guess that 150 billion US dollars went through this particular bank (the large European bank) in the U.S.,” the Briton told a Danish parliamentary hearing.

“No one really knows where this money went. All we know is that the last people to see it was these three large banks in the U.S. They were the last check, and when that failed, the money was into the global financial system,” Wilkinson said.

Interim CEO Jesper Nielsen said the affair had tarnished the reputation of Danske Bank.

“We have breached the expectations society had of us. The case and the course of events around it does not reflect the bank we want to be,” Nielsen told the Danish lawmakers after Wilkinson's testimony.

Wilkinson said that he had been offered cash by Danske Bank not to speak out, but had got a waiver last month allowing him to talk to some U.S. authorities, adding that he did not expect investigations into the “dirty money” to bear fruit.

“There is no chance in the world ... that any of that money is ever going to be tracked down and that any criminals lose a single cent,” he said.