Tehran (dpa) – Iran was expected to see its first opposition protests in 12 months on Tuesday. The protests in Tehran, being coordinated by the Green Movement, will mark one year since Iran's main opposition leaders Mir-Hossein Moussavi and Mehdi Karroubi were placed under house arrest. Authorities have warned people to refrain from protests, with the Tehran governor's office saying all necessary means would be used to prevent such gatherings. “It is clear that the police and security forces are on alert and there will be definitely have a decisive confrontation,” Prosecutor General Gholam-Hossein Mohseni-Ejehi said. Moussavi, a former prime minister and Karroubi, a former speaker of parliament, challenged President Mahmoud Ahmadinejad in the 2009 presidential election that was overshadowed by allegations of fraud. Their supporters then took to the streets in protest. Thousands were arrested and more than 100, including former reformist officials, are still in detention. BM ShortURL: http://goo.gl/7WDNf Tags: Protests, Tehran Section: Iran, Latest News