Protests erupted in Iran after a young woman died following her detention by the moral police.
Mahsa Amini fell into a coma while in custody in Tehran after being arrested by agents who enforced the country’s strict hijab rules.
Police said the 22-year-old was taken to hospital after she suffered a heart attack.
Pro-reform news websites quoted an uncle of Ms. Amini as saying she had no history of heart disease.
Iranian President Ebrahim Raisi called for the causes of the incident to be investigated with “urgency and particular attention”, state media reported.
The Human Rights Center in Iran said Ms. Amini was visiting her family in the capital when she was arrested Tuesday for her “allegedly inappropriate hijab”.
“Her family was told she was being taken for ‘re-education’ and would be released later that night,” the organization said.
The agents apparently found flaws in her hijab, or veil, according to social media reports.
The headscarf has been mandatory for women in Iran since the 1979 Islamic revolution and members of the moral police enforce the strict dress code.
In recent months, Iranian human rights activists have urged women to publicly remove the veil in an act of defiance. The gesture may lead to the arrest of women for defying the Islamic dress code.
After her death, social media posts showed protesters chanting “death to the dictator (Khamenei)” as drivers honked their horns in a Tehran square near the hospital where she died.
On Friday, police said there was no violence or physical contact between the officers and Ms. Amini while she was in custody.
Police also shared CCTV footage which appears to show Ms. Amini inside a police station with other inmates.
At one point he gets up from a chair, goes to talk to another woman, then holds her head with both hands, stumbles against a chair and collapses.
In another clip, she is seen being carried away on a stretcher.
“Our children are dying”
Ms. Amini’s death has drawn condemnation from Iranian celebrities, athletes and other public figures.
Former pro-reform president Mohammad Khatami said the behavior of the moral police was a “disaster”, while the US special envoy for Iran, Robert Malley, described the incident as “frightening”.
“Those responsible for his death should be held accountable,” he added.
Popular former footballer Ali Karimi tweeted that as the children of senior officials leave the country, “our children are dying.”
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“We need action, not excuses”
This is not the first time that the country’s moral police have been criticized.
In recent years, he has been convicted of treating people, especially young women, with online videos showing officers forcing women into police vehicles.
Iran’s supreme leader, Ayatollah Ali Khamenei, has advocated a softer attitude towards women who do not respect the official dress code.
But hardliners have called for harsh punishment and even whipping, arguing that allowing women to show their hair leads to moral decay and the disintegration of families.
Since 2017, after dozens of women publicly took off their veils in a wave of protests, authorities have taken tougher measures.