What would really be news, would be the lack of any such ”spillover” in Lebanon.
In Syrian spillover, hostilities swell in Lebanon
Sunnis show signs of growing resentment toward Shiite group Hezbollah for its involvement in civil war

BEIRUT (AP) — Gunmen from Lebanon’s terrorist Hezbollah group and local Shiite Muslim residents tightened their blockade of a Sunni town near the Syrian border Tuesday, sparking concerns that thousands of Syrian refugees stranded in the area could be cut off from humanitarian aid.
The standoff outside of Arsal, a Sunni border town in eastern Lebanon that has long been a haven for Syrian rebels, has further stoked sectarian tensions in Lebanon, where Sunnis and Shiites support opposing sides in the Syrian conflict.
There has been a further influx of Syrian rebels and refugees into Arsal since Sunday, when President Bashar Assad’s troops and his Lebanese Shiite Hezbollah allies captured the opposition stronghold of Yabroud just across the border.
Over the weekend, gunmen closed off Arsal’s only road to the rest of Lebanon by erecting a sandbagged checkpoint manned by heavily armed Hezbollah gunmen and Shiites from a string of surrounding towns. The move came after the area’s Shiites blamed Arsal for rocket fire toward their villages in recent days and a car bombing that killed three people.