Reuters reports: Iran has complained to the United Nations about a U.S. accusation it tried to assassinate a Saudi diplomat, saying one of the alleged plotters Washington calls an Iranian military official is really a member of an anti-Tehran rebel group.

Foreign Minister Ali Akbar Salehi said on Saturday the plot was part of a multi-pronged U.S. strategy to smear Tehran, a process he said would continue next week when the U.N. nuclear agency publishes a report western diplomats say will contain new evidence about Iran’s nuclear program.

The complaint to U.N. Secretary-General Ban Ki-moon turned the U.S. accusation that Tehran supports terrorism back onto Washington, Salehi said.

“This letter contains our complaint about the plots of the United States, reliable information that we have of the U.S. involvement in those plots,” he said in a news conference broadcast live on the English language channel Press TV.

On its website, Press TV reported the letter said a suspect who U.S. prosecutors have identified as an Iranian military official is actually a member of the exiled Iranian rebel group Mujahideen Khalq Organization (MKO).