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 continued over a Russia-backed Syrian government offensive near the
Turkish border.

Ahead of a much-anticipated summit later this week between the presidents of
Turkey and
Russia, the two main power brokers in
Syria,
Russian Foreign Minister
Sergey Lavrov again laid the blame for the escalation squarely on Turkey.