Dozens of rockets have been launched from Lebanon into the occupied Golan Heights.
Hezbollah fighters say they targeted an Israeli base and air defence post.
The attack follows Israeli strikes in Lebanon's Bekaa valley, 100 kilometres from the border.
Cross-border fire has been common, since the war on Gaza began.
And earlier on Sunday, Israel's military said it has completed another phase of preparations for a possible full-on war, with Lebanon and Syria.

Al Jazeera's Ali Hashem has more from Kafra in southern Lebanon.

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