US-backed forces have toured an ISIS 'religious police' headquarters where women were tortured with poles and chains if they were spotted without their faces covered, in the city of Manbij.

Syrian Democratic Forces reclaimed the building this week and posted a video of the horrific torture apparatus they found inside, after they successfully defeated the terror group near the Turkish border in northern Syria.

In the video, an SDF fighter explains the 'Hasba centre' is what ISIS call its 'religious police' headquarters.

Men would observe the attire and behaviour of the local people and bring them to the torture centre if they were spotted breaking the strict Sharia Law rules.

A Syrian Democratic Forces fighter filmed a video inside the ISIS religious police torture building. He found a chain (left) used to beat women and a list of the alleged 'crimes' (right)

'Some of them are in charge of arresting smokers. Some of them deal with the people who do not dress in the way Daesh ordered them to.

'They bring wrongdoers to the Hasba, people who wear tight pants, women who do not cover their eyes. Do you see the covered market? Women always shop there, if they uncover their eyes to see they get brought here. It is a total humiliation, a humiliation to all humanity,' he said.

'In these rooms, some of the worst violations have been committed against the people of Manbij,' the fighter explained as he toured the shattered rooms.

'We found some torture devices like a metal chain that Hasba members used for hitting, and another pipe for beating women who break their rules,' he added.

Women were brought into the prison if they 'didn't cover their eyes' or wore make-up. Men were hauled in if they dared wear tight pants or jeans (pictured)

'In these rooms, some of the worst violations have been committed against the people of Manbij,' the fighter explained

One room featured a television, which prisoners would be forced to watch ISIS propaganda videos on

ISIS would hold their prisoners in the religious police centre for two days and then transfer them elsewhere - but if the prisoners had money they could sometimes leave immediately.

Another room inside the prison included a television where prisoners were shown ISIS propaganda videos 'in an attempt to deceive them'.

Documents left behind by jihadis show how a shop owner and a woman were arrested because she uncovered her face next to him.

'There is a woman wearing makeup at the shop - this is why the arrested her. They asked for her ID and she refused. So they brought the shop owner here, ' the SDF fighter said.

An ISIS flag is seen above the religious police headquarters in the city of Manbij

Satellites which ISIS used for communicating were found inside the torture building

'There is no doubt that a lot of Manbij residents think of the Hasba as a security grip continuously terrorising them, they are scared for their lives.'

Earlier this week, harrowing footage emerged of the moment a young Syrian boy desperately tried to stop his mother from removing her niqab after the family were rescued from the clutches of ISIS.

The boy and his mother had been freed from the terror group's rule in the shattered streets of Manbij when she uncovered her face to wipe away her tears.

The little boy, who was used to living in fear that his mother will be punished if she doesn't cover her face, attempts to pull the black material back over her mouth.

The city of Manbij has been devastated by air strikes and fighting since the battle to reclaim it from ISIS began earlier this year

On Friday the SDF said they had launched a final assault to flush the remaining jihadists out of Manbij. Islamic State group fighters seized around 2,000 civilians to use as 'human shields' as they fled their former stronghold of Manbij.

The Arab-Kurdish alliance known as the Syrian Democratic Forces (SDF) expelled most of the IS fighters from the town last week, but a small number remained.

'While withdrawing from a district of Manbij, Daesh (IS) jihadists abducted around 2,000 civilians from Al-Sirb neighbourhood,' said Sherfan Darwish, spokesman for the Manbij Military Council, a key component of the SDF.

'They used these civilians as human shields as they withdrew to Jarabulus, thus preventing us from targeting them,' he added.

Earlier this week, harrowing footage emerged of the moment a young Syrian boy desperately tried to stop his mother from removing her niqab after the family were rescued in Manbij

The little boy, who was used to living in fear that his mother will be punished if she doesn't cover her face, attempts to pull the black material back over her mouth

Al-Sirb is a district in northern Manbij on the way to the IS-held border town of Jarabulus in Aleppo province near the border with Turkey.

The Syrian Observatory for Human Rights, which relies on sources on the ground to cover the conflict, also reported that IS had abducted around 2,000 civilians as they fled Manbij.

It said the civilians were placed in hundreds of cars that then headed for Jarabulus.

Darwish said the civilians who were taken were residents of Al-Sirb and other districts, including a central neighbourhood known as the 'security quarter' in the centre of Manbij.

It was not immediately clear how many jihadists fled from the town, but reports last week after the SDF forces took Manbij said that dozens of IS fighters were holed up in the 'security quarter'.

Darwish said that around 2,500 other civilians 'held captive by the jihadists were saved' by the SDF.

The US-backed forces were meanwhile combing Al-Sirb on Friday for jihadists who could still be in the neighbourhood, he added.

After the battle to reclaim Manbij from ISIS began this woman was photographed removing her Niqab on June 9

With air support from the US-led coalition, the SDF began its assault on Manbij on May 31, surging into the town itself three weeks later.

But their offensive was slowed by a massive jihadist fightback using suicide attackers and car bombs, before a major push last week saw the SDF seize 90 percent of the town.

Tens of thousands of people lived in Manbij before the assault started in May.

The United Nations has said that more than 78,000 people have been displaced since then.

Manbij had served as a key transit point along IS's supply route from the Turkish border to Raqa, the de facto capital of its self-styled Islamic 'caliphate'.

The Britain-based Observatory says that the battle for Manbij has claimed the lives of at 437 civilians - including 105 children - and killed 299 SDF fighters and 1,019 jihadists.