Iranian intelligence services have arrested the suspects accused of murdering nuclear specialists Ahmadi Roshan and Majid Shahriani and a police officer Reza Qashqai, RIA Novosti reports.
Iran believes that they were working for Israeli intelligence.
Roshan was killed by a car blast in Tehran in early January 2012. He was the deputy head of the Natanza uranium-enrichment facility. Professor Mohammadi of the Tehran University died at his house in early 2010 when a motorcycle exploded near his vehicle.
Iranian President Mahmoud Ahmadinejad blames Israel for the terrorist attacks.
The US and a set of other Western states accuse Iran of developing nuclear arms on the background of peaceful atom. Tehran denies all accusations and insists that the nuclear program is to fulfill demands for electricity.
