Iranian security forces have arrested several prominent critics of the government one day after Iranian forces killed as many as twelve people taking part in anti-government protests. The dead included the nephew of defeated presidential candidate Mir Hossein Mousavi. The protests took place on Ashura, one of the holiest days in the Shi’ite Muslim calendar. Amateur videos uploaded on the internet show bloody scenes of police and Basij militias brutally attacking crowds of protesters. Earlier today police detained former foreign minister Ebrahim Yazdi and human rights campaigner Emadeddin Baghi.