The state media says the powerful Revolutionary Guard has arrested 16 activists accused of providing material to anti-government websites.
The official IRNA news agency quotes Ahmad Ghorbani, a local prosecutor in Kerman in southeast Iran, as saying the 16 are facing charges of cooperating with Western and anti-Iran news networks.
Ghorbani didn't say when the 16 were detained but said confessions obtained during interrogations prove the charges against the defendants. The 16 were not identified but were accused of providing materials to websites seeking to topple Iran's Islamic ruling system.
IRNA's Wednesday report said some of the defendants had attended training sessions in Turkey and Malaysia.