"The solution to this lies in advancing the kind of political agreement that would transfer Assad out of power and put in power a government inside of Syria that has the confidence and reflects the will of the Syrian people,” he said, according to Ukraine Today

He warned Russia against doubling down on their support for the Assad regime.

“That's a losing bet. It's a losing bet for Russia. It's a losing bet for Syria and it is a losing bet for our efforts to degrade and ultimately destroy ISIL,” Earnest said.

See unian.info’s video section for more of the latest news from Ukraine in video from Ukraine Today, Ukraine’s 24-hour English-language news channel.