A website supporting Iran's reform movement says assailants have attacked the home of an opposition leader and wounded one of his bodyguards.

The report says Mahdi Karroubi's guards had to fire in the air after the crowd broke down the door of the home on Thursday night after days of gatherings outside.

The Sahamnews website says the attackers were members of the plainclothes pro-government militia that has led the crackdown on Iran's opposition since the disputed June 2009 presidential election.

The website reports that the attackers beat one of Karroubi's guards unconscious and he had to be hospitalized.

Karroubi was one of the pro-reform candidates who ran against President Mahmoud Ahmadinejad.