MojNews- The US demanded an explanation from Ankara on Wednesday for what it described as “ war crimes ” committed during Turkey’s invasion of northern Syria .

President Donald Trump ’s special envoy for Syria, James Jeffrey , said there were concerns about anti-Assad fighters backed by Turkish forces.

“Many people fled because they’re very concerned about these Turkish-supported Syrian opposition forces, as we are. We’ve seen several incidents which we consider war crimes,” the envoy told a House of Representatives hearing.

He said the US was also investigating the possible use of illegal white phosphorus munitions during the Turkish invasion, and wanted an explanation from Turkey’s government “at a high level.”

Jeffrey described Turkey’s invasion to drive Syrian Kurdish YPG fighters out of the border area as “a tragic disaster for northeast Syria.”