US prosecutors seek leniency for Turkish-Iranian sanctions case witness

US prosecutors are seeking leniency at next week's sentencing of Turkish-Iranian businessman Reza Zarrab, who admitted to helping Iranians and their government evade sanctions.

Prosecutors said in a sentencing memorandum to a New York federal judge on Monday that Zarrab provided substantial assistance to the US.

They said the international gold trader revealed paying millions of dollars in bribes to government and banking officials in Turkey and provided key testimony at a 2017 corruption trial that strained relations between the US and Turkey.