Protesters faced security forces in south-east Iran on Friday as they marked the anniversary of a September 30, 2022 operation now referred to as Bloody Friday, according to human rights groups and social media videos.
Videos posted on the X platform by the Iran Human Rights (IHR) group showed marchers confronting security forces in Zahedan, capital of the south-eastern Sistan and Baluchestan province, as what appears to be the sound gunfire is heard.
IHR and the Baluch rights group Hal Vash said at least 23 people had been injured.
Protests continued into the night, with several videos posted online purporting to show protesters setting fire to tyres to block streets in Zahedan.
Zahedan's prosecutor had earlier said the city was calm and videos showing the injured were old, the state news agency IRNA reported.
The semi-official news agency Tasnim said police had used tear gas to disperse “a few people who had gathered and were throwing rocks at security forces”.
In the September 30 operation, security forces killed at least 66 people, according to Amnesty International. Authorities accused protesters, angered by the alleged rape of a girl from the Baluch minority by a police commander, of provoking the clashes.
Internet monitor NetBlocks reported a “significant disruption” to the internet in Zahedan on Friday, saying authorities had “systematically shut down telecoms to suppress weekly anti-government protests”.
Molavi Abdolhamid, Iran's leading Sunni cleric and a long-time critic of Tehran's Shiite leaders, demanded justice for the victims of September 30.
“The people's demand in the past year has been that those who committed this crime be brought to Islamic justice … but judges don't have independence in Iran,” Mr Abdolhamid said in a sermon posted online
Sistan and Baluchestan, which borders Pakistan and Afghanistan, is one of Iran's poorest provinces and a major drug trafficking route.
Human rights groups said the Baluch minority, estimated to number up to two million people, has faced discrimination and repression for decades.
Iran said developing the region and resolving its problems is a “serious issue” for the government.
Zahedan has also been the scene of weekly protests since a wave of nationwide unrest triggered last year by the death of a young Kurdish woman in the custody of morality police that shook the Islamic Republic.