The three residents of villages in the vicinity of the city of Delfan, were hanged last week, local media reported.
Two of the victims were identified their initials R.H. and M.Sh.
The reports gave no further information but indicated that they have been sentenced on drug related charges.
The executions takes place a days after the United Nations Special Rapporteurs on the situation of human rights in Iran, Ahmed Shaheed, and on summary executions, Christof Heyns, called on the Iranian regime to urgently halt the abrupt surge in hangings in the country since the start of 2014.
“We are dismayed at the continued application of the death penalty with alarming frequency by the authorities, despite repeated calls for Iran to establish a moratorium on executions,” the independent experts said, stressing “the inherently cruel, inhuman and degrading nature of the death penalty.”
At least 40 persons have been reportedly hanged in the first two weeks of January, of which at least 33 executions were carried out in a week alone.