Iran has detained a fourth Iranian American, California businessman Ali Shakeri,the U.S. State Department said on Thursday, calling his arrest a "disturbing pattern" of harassment of dual citizens.Lee Hamilton, the advocate of talks with Iran says something about one of the hostages that should make him pause and reflect,
She is being held at Tehran's Evin Prison, which houses many Iranian dissidents and political prisoners.
Former U.S. Rep. Lee Hamilton is leading the effort to get Esfandiari released but admitted Wednesday that "we don't know who to talk to."
"We are just trying every lever we can possibly find," Hamilton told CNN's "American Morning."
"We're doing everything we know how to do, but you don't know where the power setters are in that country."