more on the possible escalation:

“In the midst of Syrian infighting, a mortar shell fired by the Syrian Army struck near an [IDF] outpost at Tel Azeka,” IDF spokesman Brig.- Gen. Yoav Mordechai said. “In light of the policy instituted by IDF chief of Staff Lt.- Gen. Benny Gantz, a warning round was fired back into Syria. We don’t believe it caused injuries or damages.”

“We didn’t continue firing, because this was one mortar shell we were responding to,” another IDF source said. “We will not accept any firing into our territory. This was a signal to the Syrians, that we will not be so forgiving of everything that lands in a territory.”

[link to int.icej.org]