BEIRUT – Eighteen rockets and mortar rounds from Syria slammed into Lebanon on Saturday.

It was the largest cross-border salvo to hit a Hezbollah stronghold since Syrian rebels threatened to retaliate for the Lebanese militant group’s armed support of Syrian President Bashar Assad.

The rockets targeted the Baalbek region, the latest sign that Syria’s civil war is increasingly destabilizing Lebanon.

On Friday, the Lebanese parliament decided to put off general elections, originally scheduled for June, by 17 months, blaming a deteriorating security situation in the country.