UPDATE: More on the shooting and the protests.
This is how things get quickly out of control.
Gunfire from a compound used by pro-government militia killed one demonstrator Monday after hundreds of thousands of opponents of President Mahmoud Ahmadinejad massed in central Tehran to cheer their pro-reform leader in his first public appearance since elections that he alleges were marred by fraud.
A group of demonstrators with fuel canisters attempted to set fire to the compound of a volunteer militia linked to Iran's powerful Revolutionary Guard as the crowd dispersed from Azadi, or Freedom, Square after dark. As some attempted to storm the building, people inside could be seen firing directly at the demonstrators at the northern edge of the square, away from the heart of the demonstration.
An Associated Press photographer saw one person fatally shot and several others who appeared to be seriously wounded.
