US President Donald Trump, during a press conference at the White House on Wednesday (local time), dismissed worries that captured IS fighters might escape in the chaos of a Turkish attack.
He said many of these fighters were of European origin and he had given European nations four chances to take responsibility for them.
Asked if he had any concerns that some of these IS fighters could escape and pose a threat elsewhere, Mr Trump adopted a dismissive tone.
"Well, they're going to be escaping to Europe. That's where they want to go," he said.
Mr Trump went on to criticise the Kurds for only fighting with the US over their own lands.