A bank in Cyprus investigated accounts associated with President Donald Trump’s former campaign chairman, Paul Manafort, for possible money-laundering, two banking sources with direct knowledge of his businesses here told NBC News.

Manafort — whose ties to a Russian oligarch close to President Vladimir Putin are under scrutiny — was associated with at least 15 bank accounts and 10 companies on Cyprus, dating back to 2007, the sources said. At least one of those companies was used to receive millions of dollars from a billionaire Putin ally, according to court documents.

Banking sources said some transactions on Manafort-associated accounts raised sufficient concern to trigger an internal investigation at a Cypriot bank into potential money laundering activities. After questions were raised, Manafort closed the accounts, the banking sources said.