Hayat Tahrir al-Sham, whose name means Organization for the Liberation of the Levant, was the main rebel group leading the latest offensive, launching a surprise assault in late November from northwestern Syria that quickly led to the fall of President Bashar al-Assad. It is now leading the transition to a new Syrian government.

Video shows Syrian rebel fighters destroying tomb of the late president Hafez al-Assad, the father of the ousted Syrian president Bashar al-Assad. The tomb also houses the graves of Hafez al-Assad's wife and eldest son.

Israel carried out a wave of heavy airstrikes across Syria as its troops advanced deeper into the country, a Syrian opposition war

While Syria celebrates overthrowing its longtime dictator, it is also being subjected to a new ground incursion and a wave of airstrikes from its neighbor Israel that drew growing international condemnation and concern Tuesday.

Israel has attacked Syrian military assets and has troops operating in the Golan buffer zone and slightly beyond.