• Turkish troops head to the Syrian border, in Karkamis, Turkey, Saturday, Aug. 27, 2016. Turkey on Wednesday sent tanks across the border to help Syrian rebels retake the key Islamic State-held town of Jarablus and to contain the expansion of Syria's Kurds in an area bordering Turkey .(AP Photo/Halit Onur Sandal)

    Kurdish-led Syria forces face off with Turkish-backed rebels

    BEIRUT (AP) — Backed by Turkish tanks and reports of airstrikes, Turkey-allied Syrian rebels clashed with Kurdish-led forces in northeastern Syria in a new escalation that further complicates the already protracted Syrian conflict.