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By Linda Givetash
LONDON – President Donald Trump urged European countries to take back captive Islamic statemen at the end of Saturday when US-backed Syria forces closed extremist group's last sliver of territory.
"The United States asks Britain, France, Germany and other European allies to take back over 800 ISIS warriors that we captured in Syria and tested them." Trump said Twitter .
"The caliphate is ready to fall," he added.
After years of global efforts to fight the group, the US-backed Syrian democratic forces have cornered the remaining militants in a village near the Iraqi border, under fire from all sides.
The final assault has been extended because ISIS warriors have used civilians as human shields, said SDF spokesman Mustafa Bali to NBC News.
"Over the next few days, we will spread the good news to the world of the military end of Daesh," he said Saturday using the Arab acronym for Islamic state.
In December, Trump announced that US troops would leave Syria, a sudden political shift that blinded American allies as well as many in Washington.
He reiterated this position on Saturday and urged European countries to do more, as the United States withdraws and suggests that the captured warriors would otherwise be released.
"The United States does not want to see, as these ISIS warriors pervade Europe, which is where they are expected to go," Trump warned.
Even before Trump's tweets, the potential threat from those left behind when ISIS loses its final Sunday's front page in Britain's telegraph newspaper loses its headline "800 jihadis ready to release Isil on the West."
NBC News recently reported that France is accelerating plans to end its military engagement in Syria and is considering flying prominent foreign ISIS warriors out of the country, fear of a collapsed US withdrawal from the battlefield will leave liberated areas unstable and do so impossible to contain the prisoners.
"Syrian democratic forces are currently holding foreign terrorists, including French nationals of Northeast Syria," said Agnes Von Der Mühll, a foreign minister spokesman.
She did not confirm t He added, however, that in the light of "American decisions", the French government was "exploring every opportunity to prevent these potentially dangerous people from escaping or spreading."
Law enforcement agencies from all over the world have been working to share information about captured warriors and terrorist suspects, often through Interpol, the global law enforcement organization headquartered in France.
Thousands of foreign nationals were lured to the Middle East for joining the militant movement when it emerged in 2014 and took control of large fluctuations of territory spanning both Syria and Iraq.
But accepting and prosecuting returning criminals is not a simple task. Not all Westerners who joined the group were warriors, and the depth of their engagement is not always clear.
Earlier this week, the news that British teenage Shamima Begum was now pregnant in a refugee camp and asked to return home after driving to Syria in 2015 to join ISIS for a major public debate about whether she or others like to be rehabilitated.
The news Sunday that Begum had now allegedly given birth to the child from whom she had called not to be separated if she returned to Britain could further complicate matters.
"A person who has spent a lot of time in the caliphate is likely to be radicalized and women are able to commit acts of terror as men," said NBC News security analyst Duncan Gardham of Begum. "It can be a difficult task to make sure she is not radicalized and make sure she is not a threat."
For those who committed crimes, there are deliberations on where to catch them – without risking radicalizing other inmates – and what to do with them at their release, said Shiraz Maher, director of the International Center for the Study of Radicalization and Political Weapons, at Kings College London, in a tweet thread on Thursday .