Turkey shot down a Syrian fighter jet in Syria’s Idlib province Tuesday, marking the third such incident in as many days, as steady clashes between the two national armies appeared to signal a new stage in the nine-year old war. The Turkish Defense Ministry announced on Twitter that the Turkish military downed a L-39 warplane belonging to Syrian government forces. Syrian state-run television reported that Turkish forces targeted a warplane as it was carrying out operations against “terrorist groups” in the rebel-held Idlib region.