Defense Secretary Mark Esper said Sunday that Turkey “appears to be” committing war crimes in its incursion into northern Syria.

“It appears to be, if true, that they would be war crimes,” Esper agreed on CBS’s “Face the Nation” on Sunday when host Margaret Brennan described some of Turkey’s actions against Kurdish forces as war crimes, including footage appearing to show the summary execution of Kurdish captives.

“It’s a very terrible situation over there, a situation caused by the Turks, by President [Recep Tayyip] Erdoğan. Despite our opposition, they decided to make this incursion,” Esper said.

Esper also said officials need to sort out reports that Turkish forces attacked U.S. Special Forces in Syria.

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