Reports today also say dozens of plainclothes agents and Basij forces have surrounded the area where Karrubi lives.
Karrubi's son told RFE/RL's Radio Farda that hard-liners tried to forcefully enter his father's Tehran home late on September 2, but were turned back after an altercation with the cleric-cum-politician's bodyguards.
Hossein Karrubi, who was at his father's house at the time of the attack, said that the attackers fired shots at the house and smashed the windows and surrounding street lamps.
Karrubi's website "Sahamnews" has posted some pictures and a video of the building's entrance after the attack. Bullets holes are visible.
-- Golnaz Esfandiari