Iran's former president Mohammad Khatami has called for the release of political prisoners and urged an end to house arrest for two leaders who alleged fraud after the 2009 election.
In remarks published by ISNA news agency, Khatami, in office between 1997 and 2005, said such steps would benefit the country.
He was referring to Mir Hossein Mousavi and Mehdi Karroubi, reformists held incommunicado since February 2011, after they urged massive street protests following the election.
Thousands of protesters, reformists and journalists were arrested after demonstrations that became known as Iran's green movement.
"The lift on house arrests and the release of all those who are in prison is beneficial for the country, establishment and everyone," Khatami said, referring to the prisoners.
"Although the release has been already delayed for too long, many of them will be free soon providing that no other case is being built against them," Khatami was quoted as saying.
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Khatami said a "change" in the country's political atmosphere was among expectations from the administration of self-declared moderate President Hassan Rouhani who won a first-round electoral victory over conservatives last year.
"Even if they were freed one day earlier, it would be an auspicious matter and in regards with the lift on the house arrest, I hope it happens," Khatami added.
The fate of Mousavi and Karroubi -- both of whom are reportedly suffering health problems -- has attracted global attention and triggered heated debate at home.
Western powers and UN Secretary General Ban Ki-moon have repeatedly urged Tehran to release them from house arrest and Iranian reformists have echoed those appeals.
Rouhani promised to resolve the issue and his officials have expressed criticism of the measures imposed on Mousavi and Karroubi.
In December influential Iranian lawmaker Ali Motahari, a conservative, said the judiciary should end the house arrests and put Mousavi and Karroubi on trial.
However, the decision rests with the Islamic republic's judiciary and the Supreme National Security Council. Judicial officials have in recent months said the restrictions on Mousavi and Karroubi will not be lifted unless they repent.
Meanwhile, the opposition website Kaleme.com reported that Karroubi has expressed readiness to stand open trial, so that he could give his account of what he called the "engineering" of the 2009 election which led to Mahmoud Ahmadinejad's second term in office.