19 August 2014 :

at least 11 prisoners were hanged en masse at Qezel Hessar Prison in the town of Karaj, reported the National Council of Resistance of Iran (NCRI). More inmates may have been hanged according to some reports. Four of the victims were identified as Hamed Rabii, Milad Rabii, Ebrahim and Mansour. The day before, following the transfer of their cellmates to the execution hall, a large number of inmates in ward 2 of Qezel Hessar prison staged a protest. Anti-riot Special Forces attacked them and immediately opened fire, killing and injuring dozens of inmates.
Furthermore, state-run news outlets published the images of the public hanging of a man on the same day in the city of Mianeh. The prisoner was identified as Asgar Azizi. The reports did not specify the time of his arrest but said he had been convicted of drug-related crimes and sentenced to death.