A reactor building at the Russian-built Bushehr nuclear power plant in Bushehr, Iran.

A Turkish gold trader jailed for allegedly violating the United States sanctions on Iran has added a former New York mayor and federal prosecutor, Rudolph W. Giuliani, who is close to President Donald Trump to his legal team, the New York Times reported Monday.

The move, revealed in a court filing by the U.S. attorney's office in Manhattan, raised questions of whether the jailed trader Reza Zarrab added Giuliani in an attempt to negotiate a beneficial resolution at the highest levels of the Trump administration, according to the report.