Rocket fire targeted central Israel's Sharon Plains, Haifa and surrounding areas and the Lower Galilee region sending hundreds of thousands into shelters.
Earlier the northern coastal town of Nahariya came under drone strikes. One drone exploded overnight on a building in the city's industrial zone.
According to the IDF, a surface-to-surface missile was launched in Lebanon. The military said it broke up in midflight and shrapnel fell over the Haifa Bay area, causing no injuries.
The IDF's Homefront command said there are no changes to guidelines in place around the country.
On Tuesday, rocket fire from Lebanon killed Mohammed Nai'm, in a direct hit on his home in Maalot-Tarshiha. The military said on Wednesday that its forces destroyed the launcher responsible for the deadly attack that also wounded 13 people.
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