The UN special rapporteur on Iran, Ahmed Shaheed, hailed "some limited improvements" on the ground in Iran since the 2013 election of President Hassan Rouhani, but warned "the overall situation has worsened."
Speaking to reporters before presenting his latest report on the human rights situation in Iran to the UN Human Rights Council, Shaheed pointed to soaring numbers of executions and the jailing of journalists and activists in the Islamic country.
Iran's ambassador to the UN in Geneva Mohsen Naziri Asl slammed Shaheed's report as "politically motivated", telling the council that the UN expert was "ignoring the positive developments in my country."
Shaheed meanwhile pointed out in his report that at least 753 people, including 25 women and 13 minors, were executed in Iran last year alone, marking a 12-year-high.
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Counting the 252 executions in the country since the beginning of this year, Iran has executed more than 1,000 people since January 2014, he said.
That is particularly alarming, he said, considering a majority of all executions in the country are for drug-related offences or other crimes, including adultery, sodomy, and "vaguely worded national security offences" that do not meet international standards for when the death penalty is permissible.
Shaheed called on Tehran to "declare immediately a moratorium on executions."
The UN expert, a former foreign minister of the Maldives, also lamented that Iranian authorities "continue to harass, arrest, prosecute and imprison many members of society who express criticism of the government or publically deviate from officially sanctioned narratives."
Journalists, as well as activists, lawyers and opposition politicians are often charged with breaching a range of national security laws, including on propaganda against the system, and offending government leaders, he said.