A Turkish-Iranian gold trader on Thursday told jurors in a New York federal court that Turkish President Recep Tayyip Erdogan authorized a transaction in a scheme to help Iran evade U.S. sanctions.

Reza Zarrab is cooperating with U.S. prosecutors in the criminal trial of a Turkish bank executive accused of helping to launder money for Iran. At the time of the alleged conspiracy, Erdogan was Turkey's prime minister.

Zarrab said he had learned from Zafer Caglayan, who was Turkey's economy minister, that Erdogan and then-treasury minister Ali Babacan had authorized two Turkish banks, Ziraat Bank and VakifBank, to move funds for Iran.