Shutdown of web by authorities during recent protests marks a milestone in efforts by authoritarian governments to censor online communications

Top US diplomat says he will expose 'abuse' by regime, sanction those responsible, as signs indicate demonstrations quelled

After right group says up to 200 demonstrators believed killed in nationwide protests, US leader lambastes 'tremendous violence,' while Germany condemns 'disproportionate action'

Rights group Amnesty International says more than 100 demonstrators believed killed, toll could be as high as 200

Iranian president declares anarchists took to the streets in a plot hatched by Saudi Arabia, Israel and the US

Rights group warns real death toll could be closer to 200 with video showing snipers firing into crowds; UN urges Tehran to stop using live ammunition against demonstrators

Rights office says live ammunition has allegedly been used and 'dozens of people may have been killed' since rioting began Friday

Government spokesman declares bigger concern is maintaining the country's peace and stability amid rioting over gasoline price hike

Government spokesperson predicts that in the next couple of days there won't be 'any issues' with regard to recent unrest, declines to elaborate on casualty figures

Top US diplomat publicly backs 'proud Iranian people' amid two days of violent rallies in the Islamic Republic; Tehran blasts US 'economic terrorism'