30 June 2011 :

the International Campaign for Human Rights in Iran (ICHRI) said local sources in Mashad told the ICHRI that 26 more alleged drug traffickers were hanged at Vakilabad Prison on June 15, 2011.
The secret group executions were carried out against Iran’s laws, without the knowledge or presence of lawyers and family members of the prisoners. The prisoners were not informed in advance about the final confirmation or date of their executions and were only informed hours before they were executed.