The official said that coalition officers called their Russian counterparts about the incident via the pre-established de-confliction hotline.
US Air Forces Central Command which oversees air operations over Syria later confirmed the incident to CNN.
After crossing the de-confliction line, the Russian Su-25s „were promptly intercepted by two F-22A Raptors providing air cover for partner ground forces conducting operations to defeat ISIS,“ Air Forces Central Command spokesman Lt. Col. Damien Pickart told CNN.