Iran will put around 20 'rioters' on trial, they were arrested after the disputed presidential election unrests, the official IRNA news agency reported on Wednesday. 'Indictment bills for some of those, accused of participating in the street riots after the election, have been issued by the Judiciary and they will be put on trial next Saturday,' the report said. 'They are charged with being connected to the terrorist groups, bombing, carrying weapons, raiding the Police, Basij (voluntary militia), universities and military bases, sending images to the enemy, organizing vandals and rioters, damaging public and governmental centers,' IRNA added. Protests gripped Tehran and other Iranian cities after the presidential elections, amid claims that the vote had been rigged in favor of the incumbent President Mahmoud Ahmadinejad. Iran's state media said at least 20 people had been killed in relevant clashes, including some in custody. More than 1,000 protestors and dozens of reformist activists were reportedly arrested in the wake of the disputed election. The authorities said that most of them have been released. 