Tehran's prosecutor says the brother-in-law of Iran's top opposition leader will be put on trial before the country's Revolutionary Court.

Shapour Kazemi, the brother of opposition leader Mir Hossein Mousavi's wife, was arrested in June amid a fierce crackdown on pro-reform protests that erupted following the disputed presidential election.

The state news agency IRNA says the Tehran prosecutor announced Friday that Kazemi, 62, would be put on trial, but he did not specify the charges. More than 100 reform activists have been on trial before the Revolutionary Court, accused of seeking to topple the government.

The opposition says Kazemi, an engineer, is not involved in political activity was arrested to put pressure on Mousavi.