At the press release held in Department of State, Brett McGurk, US President Donald Trump Special Envoy for Combating DAESH, said the US will continue to stay in Syria until the "internal security forces" are in place.

Responding to the question "Until when the coalition will be staying in Syria?" asked by journalists, McGurk said that they have multiple objectives in Syria. "So the military objective - very clearly, the military objective is the enduring defeat of ISIS."

"And if we've learned one thing over the years, enduring defeat of a group like this means you can't just defeat their physical space and then leave; you have to make sure the internal security forces are in place to ensure that those gains, security gains, are enduring," he said.

"So the enduring defeat of ISIS means not just the physical defeat, but make sure that we are training local security forces. So that will take some time," he added.

The Pentagon has announced before that it has begun training around 12,500 PYD/PKK elements in Syria as "experts in internal security" and "border forces", including "explosives experts". (ILKHA)