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His comments come after Washington accused Iran of being involved in a plot to kill Saudi Arabia's ambassador to Washington, a claim Iran has dismissed as baseless.

"We have undeniable documents which show America was behind the curtain of terror in Iran and the region," Khamenei said during a commemoration of the 1979 storming of the U.S. embassy in Tehran by revolutionary students.

"By presenting those 100 documents, we will disgrace America in the world," he added. He did not make it clear when he would produce the documents and to whom.