Iranian security forces have cracked down on an anti-government protest which was demanding the release of key opposition leaders who have apparently been jailed.
The websites of Mir Hossein Mousavi and Mehdi Karroubi claim both were arrested and jailed, along with their wives, after their supporters staged pro-democracy protests two weeks ago.
Iranian officials deny they are in jail but protesters have staged another rally demanding their release, resulting in clashes with security forces.
Protesters were allegedly attacked with batons and tear gas, while several people were arrested.
Judicial authorities accuse the two opposition leaders of treason and some parliamentarians want them hanged for their continuing challenge to the result of Iran’s presidential election in 2009, which reinstated Mahmoud Ahmadinejad.
Iran has placed a ban on foreign media covering the opposition protests.