The Iranian Foreign Ministry said the nuclear scientist killed in a bombing Tuesday was assassinated and the act "revealed signs of the involvement of the Zionist regime, the U.S. and their allies in Iran," state media reported.
Nearly 90 professors at Iran's oldest and largest university signed a letter to Supreme Leader Ayatollah Ali Khamenei, criticizing the government's violent handling of student protesters.
Iranian seminary students and teachers, angered by anti-government protests earlier in the week, held their own demonstration Saturday to show support for the founder of the Islamic Republic, the semi-official Fars news agency reported.
Demonstrators shouting "Death to the dictator" clashed with police in Iran on Monday as students took to the streets to mark a key national anniversary, witnesses said.
Police and demonstrators clash as Iran marks the deadly 1953 student protests.
Large crowds gathered in the Iranian capital Friday to march in an annual pro-Palestinian rally, among them thousands of green-clad supporters of the opposition movement, according to CNN sources in Tehran.
The opposition movement in Iran continues protests, despite government efforts to shift focus. CNN's Reza Sayah reports.
Iranian pro-government Basij militia members dispersed crowds of protesters here Thursday -- sometimes with force -- witnesses said.
CNN's Reza Sayah reports on the latest clashes between Iranian forces and protesters in Tehran.
People in the crowd sang songs of tribute as they waited.
CNN's Rick Sanchez talks about Ayatollah Ali Khamenei with his panel.
Iran's supreme leader delivered an impassioned defense of the Islamic Republic on Friday, insisting a majority of Iranians had faith in the existing establishment and issuing a "religious ultimatum" to protesters to end days of street demonstrations triggered by last week's presidential election.
"Millions voted for President Ahmadinejad and that makes the elections definitive," declared Iran's Grand Ayatollah Ali Akbar Khamenei during his Friday sermon.
Inside Iran
updated: Fri Jun 19 2009 18:05:00
CNN's Christiane Amanpour discusses her recent time in Iran, the situation there and answers viewer questions.
In this CNN-obtained video, thousands of people march the streets of Tehran, Iran, in support of Mir Hossein Moussavi.
Tens of thousands of demonstrators took to the streets of Iran's capital for the sixth day in a row Thursday to protest election results they consider fraudulent.
An iReporter captures students at Sharif University of Technology protesting election results.
Iran's supreme leader will deliver a sermon Friday at Tehran University, just days after a bloody crackdown at the school, according to a statement from the pro-government Basij militia.
There are signs that the ongoing protests against last week's presidential election results may be starting to divide Iran's conservative leadership.
Iranians have had to tailor their usual ways of communicating in the post-election tumult that has swept through the country.
Defying threats of arrest or worse, witnesses to protests in Iran are managing to leak reports of violence after the country's disputed presidential elections.
CNN's Isha Sesay reports on the latest images of continued social unrest coming from within Iran.
Iran said Wednesday it is investigating reports of violence at a Tehran University dormitory in the wake of rallies sparked by last week's disputed election.
Gunmen on motorcycles fired Friday on a campaign office for President Mahmoud Ahmadinejad, wounding two adults and a child, according to a report by Iran's state-run news agency.
A few dozen Iranians threw shoes at posters of U.S. President George W. Bush in Tehran Friday morning, a demonstration of support for an Iraqi journalist jailed for throwing his shoes at President Bush two weeks ago in Baghdad.
University students shouted 'dictator' as Iran's president spoke on opening day of classes. CNN's Zain Verjee reports.
Hardline conservatives took over parliament Monday after a landslide victory in Iran's disputed parliamentary elections.
Reformist members of Iran's parliament have urged President Mohammed Khatami to postpone this month's parliamentary elections, saying the disqualification of thousands of candidates by Iran's clerical rulers makes a fair vote unlikely.