Azerbaijan, Baku, Nov. 1 / Trend D.Khatinoglu /
"Iran has received a letter from the U.S. and has already replied," Iranian Foreign Minister Ali-Akbar Salehi told the Mehr News Agency on Tuesday.
"The U.S. has expressed its interest to negotiate with Iran by submitting a letter of paradoxical content about alleged assassination plot . We have already responded to it," he said.
Salehi said the letter reflects baseless claims. But, he did not announce the exact content.
Two men, including a member of Iran's special foreign actions unit known as the Quds Force, were charged in New York federal court with conspiring to kill the Saudi diplomat.
The U.S. claimed that two Iranian citizens were preparing an attack on a Saudi Arabian ambassador in Washington, and perhaps planned to blow up the country's embassy.
Iran has raised the stakes in its row with the US over the alleged plot to kill the Saudi ambassador to Washington by demanding an official apology from the Obama administration over the claim.
The U.S. said Iran was attempting to hire a member of a Mexican drug cartel to carry out the killing but failed because the gang member was actually a US informant.
Iran rejected the accusation, saying this is US diversionary tactic.