Iran rejected cooperation with the newly-appointed independent UN committee to investigate the country's repression and crackdown on anti-government protests.
Foreign Ministry spokesman Nasser Kanaani said that Iran would not cooperate with the political committee set up by the UN Human Rights Council (UNHRC)
He stressed that the hasty use of human rights mechanisms and adopting "political and instrumental" approaches toward such issues were "rejected" and failed to contribute to the human rights concept.
Kanaani indicated that Tehran "strongly protested against the interventionist and baseless statements of the German authorities."
The 47 member states of the UNHRC decided during an urgent meeting held at the initiative of Germany and Iceland to appoint a team of investigators to shed light on human rights violations during the protests crackdown in Iran.
UN High Commissioner for Human Rights Volker Turk demanded Iran end its "excessive" use of force to quell the protests that erupted after the death of a young Iranian-Kurdish woman, Mahsa Amini, while in the custody of the morality police.
In response to the UN move, Iran summoned the German ambassador to protest "interventionist" remarks by German officials and Berlin's key role in holding a UNHRC special session on Iran.
The official IRNA news agency reported that the German ambassador was summoned to the Foreign Ministry after Berlin's initiative to hold the special meeting.
Kanaani said that Iran has evidence of the involvement of Western countries in the protests sweeping the nation.
He added: "We have specific information proving that the US, Western countries, and some US allies have had a role in the protests."
Iran did not announce an official death toll of the protesters.
However, Deputy Foreign Minister Ali Bagheri Kani said that about 50 policemen were killed in the protests since September, in the first official death toll, without disclosing whether this number includes fatalities among the Revolutionary Guard Corps (IRGC) or not.
Mahabad MP Jalal Mahmoudzadeh said earlier that 105 people were killed during the crackdown launched by the authorities to quell the protests.