A CIA agent was the "main projector" of deadly demonstrations in Iran with assistance from Israel and Saudi Arabia, the country's chief prosecutor alleged on Thursday.
Planning for the plot - dubbed "Consequential Convergence Doctrine" - was initiated four years ago by an operative from the Central Intelligence Agency, Iran's prosecutor Mohammad Jafar Montazeri was quoted by the state-run IRNA news agency as saying.
The CIA operative and an agent affiliated with Israel's Mossad intelligence agency were in charge of masterminding the unrest, while Saudi Arabia paid for all the expenses, he said.
The US government has denied having any hand in the protests and the CIA declined to comment on the allegations.
At least 22 people have been killed and more than 450 arrested since anti-government demonstrations erupted across Iran on December 28.
The protests, which have focused on economic and political grievances, have been the largest display of public dissent since pro-reform rallies swept the country in 2009.