Ayatollah Ali Khamenei
Ayatollah Ali KhameneiReuters

Iran’s Supreme Leader, Ayatollah Ali Khamenei, on Sunday reportedly ordered an amnesty or reduction in prison sentences for “tens of thousands” of people detained amid nationwide anti-government protests shaking the country, acknowledging for the first time the scale of the crackdown, The Associated Press reported.

The decree by Khamenei, part of a yearly pardoning the Supreme Leader does before the anniversary of Iran’s 1979 Islamic Revolution, comes as authorities have yet to say how many people they detained in the demonstrations.

State media reports about the decree offered no explanation for the decision by Khamenei, who has final say on all matters of state in Iran. However, prisons and detention facilities already had faced overcrowding in the country after years of protests over economic issues and other matters, noted AP.

The protests erupted in September following the death of 22-year-old Mahsa Amini after she was arrested for failing to wear a head covering.

More than 19,600 people have been arrested during the protests, according to Human Rights Activists in Iran, a group that has been tracking the crackdown. At least 527 people have been killed as authorities violently suppressed demonstrations, the group said.

Several people have already been executed over their involvement in the protests and death sentences have been handed down to others.