The website of Iranian opposition leader Mir Hossein Musavi says he and his wife are at their home, apologizing for previous claims that they were in prison.
Kaleme.com said the couple was under house arrest and that the news of their transfer to a detention center was wrong.
The information could not be independently confirmed.
Meanwhile the website of Iran's other main opposition leader Mehdi Karrubi, Sahamnews.org, said it had no new information about his and his wife's whereabouts, but believed they had been taken to an "unknown location."
Officials have said that both couples were in their home, dismissing earlier claims by their websites that they had been moved to a prison.
Musavi and Karrubi have been living under virtual house arrest since they called for a February 14 rally to support the uprisings in Arab countries.
Also on March 8, Kaleme.com reported that Iranian security forces fired tear gas at antigovernment protesters as they tried to hold a demonstration in central Tehran.
compiled from RFE/RL and agency reports