The U.S Secretary of State Hillary Clinton has expressed her firm support for the thousands of opposition supporters who protested in Iran's capital yesterday. Mrs. Clinton said they deserved to have the same rights that they saw being played out in Egypt and that Iran had to open up its political system. One person was reportedly shot dead in the violent clashes between protesters and security forces in central Tehran. Dozens were detained and opposition leaders were placed under house arrest.Mrs. Clinton said the US had the same message for the Iranian authorities as it did for those in Egypt, where President Hosni Mubarak was forced to step down after 29 years in power by nationwide mass protests. She said we are against violence and we would call to account the Iranian government that is once again using its security forces and resorting to violence to prevent the free expression of ideas from their own people.