Vruir Avanessian of the Assemblies of God Church, was detained despite suffering from “serious illnesses”, including heart disease and diabetes.
The 61-year-old pastor, who was forced to halt several church duties due to his medical condition, also undergoes kidney dialysis three times a week at the private Heshemi-Nejad hospital in Tehran, according to reports.
His detention comes amid a wider crackdown by authorities on Armenian-Iranian Christian leaders and pastors.