Iranians are starting to get armed in order to defend themselves and their compatriots against the savage security forces of the Islamic Republic. It's only a question of time when this will escalate and more and more people realize that they cannot fight bullets with their fists.
Reports from people on the scene state that numerous transport planes have landed in Iran filled with Basijis (brainwashed religious zelouts) from the Lebanese Hezbollah and Palestinian Hamas and Venezuelan anti-riot police (courtesy of AhmadiNejad's close friendship with the Hugo Chavez!). "The reason such forces are being brought in is that some of the Iranian police are unwilling to hit people as ordered and some are even joining the protesters" (Source #2)
Last night the natural gas line going into a Basij Headquarter, located in Eastern Tehran, was set on fire which consequently resulted in the building being blown up. The Basij had locked themselves in the building once they couldn't withstand the Iranian freedom fighters - at least 5 of these Basij animals were disposed of in this action. The below clip captures footage of the blown up building (at 0:05 you see the building going up in flares to the right of the screen):