Lebanese border areas between troops led by Hayat Tahrir Al Sham and fighters aligned with Hezbollah, sources on both sides said, after the killing of three Syrian soldiers, in a major escalation despite efforts by the two governments to improve relations.

Syria’s military fired rockets and shells at Lebanon on Sunday after accusing Iran-backed Hezbollah of executing three Syrian army personnel, sparking unusual tensions between the two war-ravaged neighbors.

Ordnance from Syria's 13-year conflict exploded in the coastal city of Latakia, collapsing a building and killing more than a dozen people, the Syrian Civil Defense said Sunday. The paramedic group known as the White Helmets said it worked overnight,