Dhaka, Sept. 23 -- At least 31 civilians have been killed in an Iranian security forces crackdown on protests that erupted over the death in custody of Mahsa Amini after her arrest by the morality police, an Oslo-based NGO said Thursday.

"The people of Iran have come to the streets to achieve their fundamental rights and human dignity... and the government is responding to their peaceful protest with bullets," Iran Human Rights (IHR) director Mahmood Amiry-Moghaddam said in a statement, publishing a toll after six days of protests.

IHR said it had confirmed protests taking place in over 30 cities and other urban centres, raising alarm over "mass arrests" of protesters and civil society activists.

IHR said its toll included the deaths o...