Source:
TimesOnline (UK) 
Iranian security forces today rounded up at least seven prominent activists amid reports that the body of the opposition leader's nephew, killed on Sunday as hundreds of thousands took to the streets, had gone missing
Clashes had been expected at a funeral ceremony for Seyed Ali Mousavi, whose uncle Mir Hossein Mousavi was defeated in hotly disputed elections earlier this year.
Instead police fired teargas to disperse Mousavi supporters who had gathered outside the hospital that his body had been taken to, an Iranian opposition website said.
Iran’s Supreme National Security Council said that eight people were killed on Sunday in anti-government protests across Iran that erupted during the religious festival of Ashura. Iran’s Health Ministry said that over 60 people had been injured in Tehran, with around 300 people reportedly arrested.
A report on the website of state television put the number of dead as high as 15 and quoted the Ministry of Intelligence that more than 10 were members of "anti-revolutionary terrorist" groups.
The other five who reportedly died during the bitter clashes in the Iranian capital were killed by "terrorist groups," Iranian TV claimed.
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http://www.timesonline.co.uk/tol/news/world/middle_east/article6969523.ece