About 50 police have been killed in the protests shaking Iran since September, the deputy foreign minister says, giving a first official death toll amid an intensified crackdown on Kurdish areas in recent days.
Iranian security forces have clashed with protesters across the country, with the UN rights commission saying more than 300 demonstrators have been killed since the death in custody of 22-year-old Kurdish woman Mahsa Amini on September 16.
UN rights chief Volker Turk said on Thursday Iran faced a "full fledged human rights crisis" with 14,000 people arrested so far, including children. He was speaking before a special session in Geneva with a possible vote on setting up a fact-finding mission.
"Around 50 police officers were killed during the protests and hundreds were injured," said Deputy Foreign Minister Ali Bagheri Kani, who is also Iran's chief nuclear negotiator, in an interview on Indian television.
He gave no figure for the number of protesters killed but said the interior ministry had formed a panel to investigate the deaths.
The protests triggered by Amini's death after she was detained by morality police for attire deemed inappropriate under Iran's strict Islamic dress code quickly spread all over Iran. Anger has focused on women's rights but protesters have also called for the fall of Supreme Leader Ayatollah Ali Khamenei.
Iran's clerical rulers have recently hardened the crackdown in Kurdish areas, with the UN Commissioner for Human Rights saying on Tuesday there were reports of more than 40 killed there in the past week.
A parliament member from the mainly Kurdish city of Mahabad said he had been issued repeated summons for his stance in support of protesters.
"The judiciary has raised a complaint against me as a representative of the mourning people instead of conserving the legal rights of the protesting people and the families of victims in Mahabad and Kurdish cities," Jalal Mahmoudzadeh tweeted on Wednesday.
Prominent Sunni Muslim cleric Molavi Abdulhamid, who has been outspoken in criticising the treatment of Iran's mostly Sunni ethnic minorities by the mainly Shi'ite ruling elite, tweeted on Wednesday against the crackdown in Kurdish areas.
"The dear Kurds of Iran have endured many sufferings such as severe ethnic discrimination, severe religious pressure, poverty and economic hardships. Is it just to respond to their protest with war bullets?" tweeted Molavi.