This is the horrifying moment a woman in Iran is seen being dragged off the street by the country's 'morality police'.
In the clip, the woman, dressed in western clothing, can be seen grappling with an officer on the street in one of Tehran's student areas.
As the pair struggle, other police officers rush to assist their colleague, who is wearing a traditional hijab, before hauling the student off the street.
They shove her into the back of their unmarked car as she screams out to help from passers-by.
The person who shot the harrowing footage late said: 'I'm a student on Amir Kabir University. This street is close to our university. The area itself is popular hangout place between girls and boys to socialise and to smoke.iPhone transfer software
'On my way back from university, I realised that the morality police was dealing heavy-handedly with boys and girls.
'When ordinary passers-by were drawing closer to the car of these policemen and policewomen, they faced threats of arrest and were told to mind their own business.'
The woman, dressed in western clothes, can be seen grappling with a female officer in a hijab
Other police officers show up to offer backup to their colleague as they try to detain the student (right)
Eventually she can be seen being manhandled into the back of an unmarked car as she screams out for help
This is by no means the only case of brutal treatment by Iran's so-called 'morality police officers' however.
A young woman was recently assaulted by a gang of female police officers who deemed her headscarf 'insufficient' because it only loosely covered her hair.
Terrifying video showing her being savagely beaten was broadcast widely on social media - provoking an outpouring of public sympathy.
In response to the violent attack, a brave woman posed next to a police car without her hijab while a whole family removed their headscarves in solidarity.
A growing number of Iranian woman have taken to the streets without the mandatory hijab in recent days after the video surfaced.
The video has reignited a public debate on the decades-long requirement for women in the Islamic Republic to wear hijabs.
Officials of all ranks up to President Hassan Rouhani have weighed in on the incident as women question being forced to wear the hijab in public.
The video appeared online last week, with activists suggesting it was taken in Tehran, though nothing in it offers hints at its location
It shows a young woman with a long red scarf loosely covering her head, her hair clearly showing, being surrounded by three morality policewomen wearing chadors, who grab her
She then ends up on the ground, weeping as another woman comforts her before the officers grab her again
She can later be seen lying on the floor, crying in pain and without her headscarf, as a large crowd surrounds her
On Tuesday, advocacy group My Stealthy Freedom shared a picture of a young woman leaning against a police car without her hair covered.
'Welcome to the 46th week of #WhiteWednesdays!' the caption said.
My Stealthy Freedom, an online group campaigning against the forced hijab, highlights instances of abuse of women who choose not to wear it.
The group's founder Masih Alinejad launched the social media hashtag White Wednesdays, encouraging women to flout regulations posting pictures and videos of themselves without the hijabs online.
She also shared a clip sent to her from a family who posed with their backs to the camera, but with their hair uncovered.
A brave woman posed next to a police car without her hijab in Iran in solidarity with a woman who was viciously beaten by 'morality police officers'
A group of women uncovered their hair in a video shared on Twitter, during which a a man's voice is heard saying: 'I join my family to say NO to forced hijab'
Another woman filmed herself as she walked through the streets of Karaj with her hair uncovered
'I join my family to say no to forced hijab in the hope of freedom for Iran,' a man's voice is heard saying during the clip.
Another woman filmed herself as she walked through the streets of Karaj with her hair uncovered.
'Today I walked the whole way without the compulsory hijab,' she said in the clip.
'I wanted to say that like many, I'm against compulsory veil too. I want to say no to compulsory veil and I hope there comes a day when all Iranian women can take a walk with no fear or stress and without having to put on a compulsory veil.
My Stealthy Freedom was also the first to upload the video of the young woman who was assaulted.
Videos have been posted showing women bravely defying the country's law by walking through the streets of cities like Tehran and Shiraz without the hijab
Several of them face verbal and physical abuse in the street, with bystanders urging them to cover their hair
Their protest has been named #WalkingUnveiled and is quickly spreading on social media
Alongside the video, the group wrote: 'This woman is savagely beaten up by morality police as punishment for her insufficient hijab. And they tell us hijab is a 'small issue'.'
They added: 'We expose them and we resist compulsory hijab.'
Since then, videos have been posted showing women bravely defying the country's law by walking through the streets of cities