Turkey used US, Russian-controlled airspace in Syria strikes: Sources, Reuters

Turkey’s warplanes crossed into Russian and US-controlled airspace for the first time to attack US-backed Kurdish fighters in Syria, and it has rallied Syrian allies to possibly expand the campaign, several Turkish and Syrian rebel sources said.

The F-16 jet raids happened in the last few days as Turkey and the YPG escalated tit-for-tat strikes that have killed civilians on both sides of the border, set off when Ankara said it was retaliating after a deadly Nov. 13 bombing in Istanbul.