The ‌U.S. Department of Justice is investigating how Iran's Supreme Leader Mojtaba Khamenei built a global investment portfolio with exposure to Wall Street banks, Bloomberg News ‌reported on Thursday, citing officials ​familiar with the matter.

The probe is part of a broader examination ⁠into allegations of money laundering and corruption, ​and includes scrutiny of transactions involving firms overseen by ⁠Khamenei, according to the report.

Investigators are reviewing the role of U.S. banks in those transactions, Bloomberg News ‌reported, citing people familiar with the ​matter. The report ‌said that the banks under review include JPMorgan Chase ‌and Citigroup.

JPMorgan and the DOJ did not immediately respond to Reuters' requests for comments, ⁠while Citigroup declined to ‌comment.

The investigation ⁠does not necessarily mean charges will be filed, the ⁠Bloomberg ⁠News report said, adding that the primary focus of the ‌probe was Khamenei.

Khamenei was chosen as Iran's supreme leader after his father, Ayatollah Ali Khamenei, ‌was ​killed in a ‌U.S.-Israeli airstrike. The supreme leader has the final say on matters of state, ​including foreign policy and Iran's nuclear program.