Opposition holds rally in Tehran (4 images)
Clashes between security forces and protesters reportedly continue in Tehran where demonstrations meshed with public commemoration plans.
Each December Iran marks the killing of three students by the government led by the shah. However, this year's events have been co-opted by opponents of the current government to stage protests.
Exactly what is occurring in Tehran cannot be verified because of government bans on outside media reporting on the situation.
Word has leaked out, again unconfirmed, that Iranian officials used tear gas to break up rallies Sunday and Monday.
The 1953 demonstrations were marked with cries of "Death to the Shah" while the 21st-century version hears "Death to the Dictator," in an apparent reference to Iranian President Mahmoud Ahmadinejad. His government has been tamping down vocal protest since last summer's election, which some people in the country said was far from fair.
