The news agency said two of its reporters, Joel Schectman and Bozorgmehr Sharafedin, spent dozens of hours interviewing six Iranian former CIA assets, as well as 10 former employees of the United States Intelligence Community, who have “knowledge of Iran operations”. All six of the Iranians interviewed spent between five and 10 years in prison for their CIA connections. Two of them left Iran after serving their prison sentences, and are now refugees in central and northern Europe. At least one of them claims he was never contacted by the CIA after his release in 2019.

According to the Reuters investigation, CIA assets in Iran operate in a high risk environment, given that the United States has not had diplomatic facilities in the Middle Eastern country since 1979. Diplomatic facilities are regularly used to shelter CIA personnel, who recruit, train and handle foreign assets. Despite the absence of such facilities, the CIA is willing to take great risks in running agents inside Iran, because of the country’s geopolitical significance. The agency’s intensity in operating in Iran is matched by the Islamic Republic’s aggressive counterintelligence posture, which, according to the Reuters investigation, has “netted dozens of CIA informants” in recent years.

It is claimed that Iran’s counterintelligence efforts were inadvertently aided by a mass-produced CIA covert communications system, which the spy agency operated until 2013 in at least 20 countries around the world, including Iran. The Internet-based system was intended for use by CIA sources who were not fully vetted, but were still considered useful due to their access to secret information, according to Reuters. This appears to be a major update on a story that was first reported by Yahoo News in 2018. It claimed that that the CIA had suffered a “catastrophic” compromise of the system it used to communicate with spies, which caused the death of “dozens of people around the world” according to sources.

Reuters said it contacted CIA spokeswoman Tammy Kupperman Thorp, who declined to comment on specific allegations. The CIA spokeswoman dismissed the “notion that CIA would not work as hard as possible to safeguard” its assets around the world as “false”. The news agency said it also contacted Iran’s Ministry of Foreign Affairs and its Mission to the United Nations in New York, but received no responses.