The United Nation report states that Iran is on course to execute more than 1,000 prisoners this year.
UN Special Rapporteur Ahmed Shaheed called it an 'unprecedented assault on the right to life in Iran,' stating that Iran has already executed over 700 prisoners since January, Fox News reported.
There is a surge in capital punishment over the past year, he added.
Most of the prisoners who are on the death row are mostly nonviolent drug offenders.
Iran has violated international law by hanging two juvenile offenders within the past two weeks. There are many others who are on the death row, Shaheed added.
According to Amnesty International, Iran is among the top three executioners in the world.