Iranian opposition leader Mir Hossein Musavi's website said today that security forces had attacked his office and seized his computers.
The Kaleme website said that with the attack on September 15, "a new wave of pressure and limitations" on Musavi had started.
It said some of his belongings were taken along with the computers.
Musavi, who lost to President Mahmud Ahmadinejad in a disputed election in June 2009, has remained the main leader of the reformist Green Movement.
Both Musavi and another opposition figure, Mehdi Karrubi, say the vote was rigged to secure the reelection of Ahmadinejad, but authorities deny the charge, saying it was the healthiest election the country has had.
compiled from agency reports