At least 76 protesters have been killed by Iranian security forces during 11 days of unrest sparked by the death of a woman in custody, activists say, and hundreds more, including journalists, have been arrested.
Iran Human Rights (IHR), a Norway-based organisation, accused authorities of using disproportionate force and live ammunition to suppress the dissent.
"The risk of torture and ill-treatment of protesters is serious and the use of live ammunition against protesters is an international crime," said IHR's director Mahmood Amiry-Moghaddam. "The world must defend the Iranian people's demands for their fundamental rights."
Read more here.