
Diehard jihadists swelling Syrian refugee camps have vowed revenge as the last remaining ISIS holdout in Syria faced imminent collapse.

One veiled woman, feared to be among thousands of unrepentant fanatics who have fled Baghouz and surrendered to US-backed Kurdish forces, chillingly warned: 'We will seek vengeance, there will be blood up to your knees.

'We have left, but there will be new conquests in the future.'

The civilians have continued to stream out of the ragged tent encampment the village of Baghouz since December.

As they came out of their bastion in eastern Syria, many civilians are unrepentant and promise bloody vengeance against the enemies of ISIS. A veiled woman is pictured walking towards a screening point as hundreds of civilians, who streamed out of the Islamic State group's last Syrian stronghold, arrive in an area run by US-backed Syrian Democratic Forces outside Baghouz in the eastern Syria

The US-backed Kurdish coalition forces thought only a few families remained in the enclave - but they now fear they may have severely underestimated the number of brainwashed ISIS followers left inside.

12,000 people from Baghouz arrived in one camp for non-combatants in northern Syria in the past 48 hours.

As they came out of their bastion in eastern Syria, many are unrepentant and told media bloody vengeance against the enemies of ISIS.

Diehard jihadists swelling Syrian refugee camps have vowed revenge as the last remaining ISIS holdout in Syria faced imminent collapse. Pictured, civilians streaming out of the ragged tent encampment in the village of Baghouz

Smokes rises from the makeshift camp for Islamic State members and their families in the town of Baghouz

A still from a video released by the Free Burma Rangers showing people moving between tents in a makeshift camp in the last ISIS-controlled piece of territory in Syria's Baghouz

A fully veiled woman carries her injured child as she walks to members of the Kurdish-led Syrian Democratic Forces (SDF) just after leaving the Islamic State group's last holdout ing Baghouz

At an outpost for US-backed forces outside the village, 10 women stood in front of journalists, pointing their index fingers to the sky and shouted: 'The Islamic State is here to stay!'

The gesture is used by IS supporters to proclaim the oneness of God.

Many of the women leaving the bastion told AFP they wanted to raise their children using ISIS ideology.

One 60-year-woman, who did not want to be named, said that ISIS will continue because the boys under the terror group's rule have been trained to fight from a young age.

She said: 'The caliphate will not end, because it has been ingrained in the hearts and brains of the newborns and the little ones.'

Some of the civilians threw rocks at the cameras of those trying to film them, while one screamed at a photographer and calls him a pig.

Nearby, a bearded man with a leg wound cursed the coalition, whose warplanes have pummelled the last jihadist redoubt.

"I only surrendered because of my injury," he says. "I have been with IS since the beginning.

Despite US-backed Kurdish fighters hopes that the final day has come for the ISIS 'caliphate', - its last tiny sliver of land just won't seem to empty.

'When we began the operation we knew there would be civilians, but not in such a big number,' Adnan Afrin, a spokesman for the Syrian Democratic Forces, said Thursday.

In recent days thousands more men and women - including those who once flocked to join IS from across the globe - left the IS pocket, upending assumptions that only a few families remained holed up in Baghouz and those who refused to leave or surrender were choosing to die there.

'They're coming from underground... they're never-ending,' said one SDF official.

ISIS forces fleeing the village of Baghouz in the eastern Deir Ezzor province have been cornered into a small piece of land between US-backed forces and a riverbank

The International Rescue Committee on Friday said as many as 12,000 people from Baghouz have arrived in one camp for non-combatants in northeast Syria over the past 48 hours, including some 6,000 people on Thursday alone.

The women trucked out of the bastion this week gave drastically varying figures on the holdout families that remain in the bombed-out and besieged jihadist bastion.

'There's still more,' said Umm Aboud from the northern Syrian city of Al-Bab.

'You see how many people have come out in the past few days, there's that many still inside,' said the mother of four, her bright green eyes peering through a black veil.

A child sitting in a baby carriage surrounded by scattered blankets and other possessions near the village of Baghouz, Deir Al Zor province, in Syria

The militants and their families were forced to set up camp amongst battered pickup trucks and tents on the last scrap of land of ISIS-controlled territory

Members of White Helmets conduct a search and rescue operation after war planes belonging to Assad Regime's army carried out airstrikes at the de-escalation zone

Women hugging near the village of Baghouz, Deir Al Zor province, in Syria, as US-backed forces sweep the dying 'caliphate' out of its Syrian-controlled territory

The US-backed Syrian Democratic Forces have struggled to deal with thousands of people who have fled Baghouz

Footage obtained from the Free Burma Rangers, a Christian aid group run by a former US special forces operative, showed hundreds of people still remained in the riverside camp

More than 55,000 civilians have arrived in the Kurdish-run Al-Hol camp since December, according to the International Rescue Committee.

'The IRC and other agencies are doing all they can do help the new arrivals but Al-Hol camp is now at breaking point,' the organisation said Friday.

'No one could have guessed that such a large number of women and children were still living in Baghouz.'

Black-clad women trucked out of Baghouz in the past few days have said they were living crammed together in trenches, tents and cars near.

'There are thousands of families leaving... but there were thousands and thousands of families there, even I was surprised,' 35-year-old Umm Alaa, from the Iraqi town of Heet, said Wednesday after fleeing.

The mother of 10 said she lost a child last week due to hunger as the situation grew increasingly desperate.

Footage obtained from the Free Burma Rangers, a Christian aid group run by a former US special forces operative, showed hundreds of people still remained in the riverside camp.

In the images said to have been taken Thursday, women draped in black are seen walking through the came around overturned cars and scraps of twisted metal which lay on the ground.

The aid group has come in close proximity to the camp in recent days and its head, David Eubank, said some two thousand people could remain inside.

Analyst Mutlu Civiroglu, on the ground in eastern Syria, said that IS was purposefully trying to conceal its numbers.

They have regularly been 'releasing certain numbers of people, including fighters, in controlled amounts' in an attempt to buy time, he said.

'If they really wanted to surrender, they would have... and if they wanted to fight again, they could have,' he added.

The delay was 'a deliberate effort, maybe to prepare for something else... what that is though is unclear'.

ISIS created a proto-state across large parts of Syria and Iraq in 2014, ruling millions of people, but has since lost all of it except a tiny patch in Baghouz by the Euphrates River.

Some of the last IS fighters and their families were cornered on Friday on the water's edge.

They were caught between advancing Kurdish forces and Syrian regime fighters across the river.

But General Joseph Votel, head of the US Central Command, warned today that many of those being evacuated from the area are 'unrepentant, unbroken and radicalised'.

He told Congress the fight against ISIS was 'far from over', and stressed the need to 'maintain a vigilant offensive against this now widely dispersed and disaggregated organisation'.

Thousands of men, women and children have streamed out of the ISIS group's embattled holdout of Baghouz in eastern Syria in recent days

Children sitting next to their injured mother with one resting his head on her as she lies on the ground surrounded by discarded possessions near the village of Baghouz

General Joseph Votel, who oversees US operations in the Middle East, said ISIS fighters had already dispersed across Iraq and Syria and remained radicalised.

He told the House Armed Services congressional committee: 'Reduction of the physical caliphate is a monumental military accomplishment but the fight against Isis and violent extremism is far from over.

'What we are seeing now is not the surrender of ISIS as an organisation but a calculated decision to preserve the safety of their families and the preservation of their capabilities by taking their chances in camps for internally displaced persons and going to ground in remote areas and waiting for the right time to resurge.

He added: 'We will need to maintain a vigilant offensive against this now widely dispersed and disaggregated organisation that includes leaders, fighters, facilitators, resources and toxic ideology.

'The ISIS population being evacuated from the remaining vestiges of the caliphate largely remains unrepentant, unbroken and radicalised.'

A fighter from the Syrian Democratic Forces (SDF) walking in front of two trucks carrying refugees to a camp in the north of the country, near the village of Baghouz

Men sitting together in a queue waiting for aid, some injured and others living in makeshift camps near the village of Baghouz

Aid groups have said that children who have fled Baghouz are 'victims of the conflict' who must be protected

As the so-called caliphate crumbles, many Western countries have struggled to decide what to do with its citizens returning from the fighting.

Donald Trump urged European countries to take back their suspected fighters and try them in their own countries, threatening via Twitter that US-backed forces in Syria would release the militants into Europe.

The Kurds also want foreign nations to repatriate their citizens and jail them in their lands, but are willing to make compromises if the international community will provide the funding and security for new prisons.

Last month Iraq announced a group of 13 French citizens accused of fighting for ISIS are to be tried in the country rather than face charges in their home country.

And the Kurdish government in Syria said if Britain and other European countries will not take back their jihadi citizens, then international tribunals, similar to the Nuremberg trials used to convict Nazi's after the Second World War, could be set up to deal with the problem.

Members of Syrian Democratic Forces (SDF) help a woman near Baghouz with her food and belongings as one of the soldier's Kalashnikov rifles rests against her bags

A Syrian fighter of the Turkish-backed Hamza Division mans a turret mounted in the back of a pickup truck flying a Turkish flag at a position in the village of Ulashli near the frontline in the northeast of Aleppo

A member of Syrian Democratic Forces (SDF) helps a woman near the village of Baghouz as thousands of men, women and children flee the fighting

A Syrian fighter of the Turkish-backed Hamza Division aims a Kalashnikov assault rifle from a position in the village of Ulashli near the frontline in the northeast of Aleppo

A boy looks out of a truck tarp near the village of Baghouz as he is transported in vehicles taking displaced families to refugee camps in Kurdish-controlled norther Syria

Civilians evacuated from the ISIS's embattled holdout of Baghouz wait for bread and water at a screening area held by the Kurdish-led Syrian Democratic Forces (SDF), in Deir Ezzor

A woman walking with crutches stands next to a child as people evacuated from the area of Baghouz

An injured woman and her four children evacuated from ISIS's holdout of Baghouz sit at a screening area held by the US-backed Kurdish-led Syrian Democratic Forces (SDF)

A queue of civilians being evacuated from the brutal fighting in the Baghouz area, where thousands of militants and their families have fled

More than 7000 people, mostly women and children, have fled the shrinking pocket over the past days, as US-backed forces press ahead with an offensive to crush holdout jihadist

Children believed to be from the Yazidi community, who were captured by ISIS fighters, pictured after being evacuated from ISIS's last stronghold

A woman kisses the hand of a soldier at a reception area for people evacuated from the last shred of territory held by ISIS militants, outside Baghouz