A judge says he’ll look into what roles ex-New York City Mayor Rudolph Giuliani and a former U.S. attorney general have in the defense of a Turkish businessman charged with helping Iran evade U.S. sanctions.

Manhattan federal Judge Richard Berman issued an order Tuesday asking lawyers to explain how the roles of Giuliani and former Attorney General Michael Mukasey might differ from those of other defense attorneys.

Prosecutors have urged Berman to ensure there are no conflicts of interest if Giuliani and Mukasey join the defense of Reza Zarrab, who has pleaded not guilty.

He was arrested in Miami in March 2016.

Prosecutors say law firms employing Giuliani and Mukasey have represented bank victims in the case. They also say Giuliani and Mukasey are involved in efforts to resolve the charges.

(AP)