World | Iranian nuclear program Iran: We Can Prove CIA Helped Kill Scientist Tehran says it has 'evidence' of US assistance By Newser Editors and Wire Services Posted Jan 14, 2012 10:32 AM CST Copied Mourners carry a flag-draped coffin of Mostafa Ahmadi Roshan on Friday. (Mehdi Ghasemi) Iran said today it has proof that the United States was behind the assassination of an Iranian nuclear scientist this week in Tehran. The IRNA state news agency said Iran's Foreign Ministry has sent a diplomatic letter to the US asserting that it has "evidence and reliable information" that the CIA provided "guidance, support and planning" to assassins "directly involved" in the killing of Mostafa Ahmadi Roshan. IRNA also reported that Iran delivered a letter to Britain accusing London of having an "obvious role" in the killing. It said that a series of assassinations began after British intelligence chief John Sawers hinted in 2010 at intelligence operations against the Islamic Republic. The killing has sparked outrage in Iran, and state TV broadcast footage today of hundreds of students marching in Tehran to condemn Roshan's death and calling for the continuation of the country's nuclear program. Read These Next It started with failure to say 'thank you,' ended with murder. Mike Johnson is taking heat over a Democrat's delayed swearing-in. It landed on the 4th try. There wasn't enough fuel for a 5th. California governor candidate's testy interview raises eyebrows. Report an error