Inspired by Egypt's popular revolt which ousted President Hosni Mubarak from power last week, thousands of Iranian pro-democracy advocates took to the streets of Tehran for yet another "Day of Rage" for a nation's cowed opposition.
As the Associated Press is reporting, Iranian police used tear gas against the protesters in central Tehran's Enghelab, or Revolution, square and in Imam Hossein square, as well as in other nearby main streets. Demonstrators responded by setting garbage bins on fire to protect themselves from the stinging white clouds.
You can view the latest updates on the Iranian protests here.
View a selection of dramatic photos from the protests below. (Please note that these photos were obtained by the Associated Press and Getty from independent sources following an official Iranian government denying foreign media access to the protests).