Israeli public broadcaster Kan said on Friday around 150 rockets were fired from Lebanon across the border.
Israeli ambulance service said there were no immediate reports of casualties.
Lebanon's Hezbollah announced on Friday they launched seven separate attacks on Israeli targets with Katyusha rockets.
This came a day after the militant group’s leader Hassan Nasrallah vowed to retaliate against Israel for a mass bombing attack, the Israeli military and the militant group said.
Israel’s military said the rockets came in three waves Friday afternoon targeting sites along the ravaged border with Lebanon.
Hezbollah said it had targeted several sites along the border with Katyusha rockets, including multiple air defense bases as well as the headquarters of an Israeli armored brigade they said they’d struck for the first time.
Hezbollah said the rockets were in retaliation for Israeli strikes on villages and homes in southern Lebanon.
