Iranians continue to gather at the graves of those who have been killed by security forces in ongoing nationwide protests that have rocked the country since the death of a woman in police custody, calling for regime change despite a brutal crackdown on dissent by the authorities.

Since Mahsa Amini's death, Iranians have flooded into the streets across the country to protest against a lack of rights, with women and schoolgirls making unprecedented shows of support in the biggest threat to the Islamic government since the 1979 revolution.

In response, the authorities have launched a brutal crackdown on dissent, detaining thousands and handing down stiff sentences, including the death penalty, to protesters.

In recent weeks, protesters have turned the end of the traditional 40-day mourning period following a protester's death into a stage for anti-government demonstrations.

Videos published on social media on January 26 showed crowds at the grave of Hamidreza Rouhi, a university student who had a modeling career since childhood and was shot dead during a demonstration in the Iranian capital, Tehran, on November 18.

They chanted "Death to the dictator!," a reference to Iranian Supreme Leader Ayatollah Ali Khamenei, as they gathered to honor Rouhi.

In the western city of Khorramabad, people flocked to the cemetery where Nika Shakrami -- a 16-year-old killed after participating in anti-government protests in Tehran on September 20 -- was buried.

Similar scenes were repeated in the central city of Arak, where Mehrshad Shahidinejad was buried. Shahidinejad was a 19-year-old aspiring chef who was reportedly killed after being arrested during a protest.

Reports also indicate that a group of people and family members of Mohammad Mehdi Karami visited a cemetery in the city of Eshtehard to lay flowers at the graves of Karami and another protester, Mohammad Hosseini.

The were hanged in prison on January 7 following threats by Iranian authorities of harsher penalties to those who participate in the unrest.

The activist HRANA news agency said that as of January 15, at least 522 people had been killed during the unrest, including 70 minors, as security forces muzzle dissent.

Written by Ardeshir Tayebi based on an original story in Persian by RFE/RL's Radio Farda