The agency notes that the fate of an estimated 800 to 1,000 al-Qa'ida arrested by the Syrian Democratic Forces(SDF) in northeastern Syria has been unknown since President Donald Trump tweeted in February that the United Kingdom, France, Germany and other European countries must "recover more than 800 IS elements ".
The United States is demanding Britain, France, Germany and other European allies to return more than 800 mercenaries, urging those arrested in Syria to stand trial.
When Bolton was asked whether the United States would bring captured mercenaries to trial, Bolton said: "This is possible, but we are not eager to take this responsibility simply, we think others are also responsible, and that is the approach we are taking."
Bolton pointed out that the United States is seeking a deal on the status of the region in part so that mercenaries can remain imprisoned in northeastern Syria "for the foreseeable future."
During their war against IS, SDF arrested hundreds of foreign mercenaries who entered Syria and Iraq via Turkey.
The Syrian Democratic Council (MSD)has repeatedly said it is difficult to control the situation if the region is attacked by Turkey, whose president is threatening to launch attacks on northern and eastern Syria.