President Mahmoud Ahmadinejad, addressing tens of thousands gathered at a shrine marking the death 21 years ago of the Ayatollah Khomeini, said opposition groups still disputing last year's elections would be "banished by the people," the BBC reported Friday.
Opposition candidates claim the results of last June's election were altered by Ahmadinejad.
This led to mass rallies with thousands taking to the streets in protest, resulting in dozens killed and scores of arrests.
Nine of the protesters arrested have been sentenced to death, the BBC said.
Supreme Leader Ayatollah Ali Khamenei also warned past leaders, saying people would be judged by their present actions rather than their past record and Iran would "see off any conspiracies."
This was seen as a warning to the opposition leadership, which includes a former president and former prime minister, the BBC said.