15 December 2016 :

Iranian regime executed four prisoners in Karaj Central Prison, west of Tehran, on drug related charges, reports indicate.
These four prisoners had their last visit with the family, on December 14 night and were sent to the gallows early morning today (December 15). 
The hall leading to solitary confinement cells in ward 5 of this prison, where death row prisoners are transferred before their executions, has been completely closed to all outsiders, other reports indicate. It is said this measure is aimed at preventing news from leaking out regarding those transferred for their executions.