Around 10 people were killed, including two children, and five were wounded in an Israeli strike on a residential building in the city of Nabatieh in south Lebanon, state news agency NNA said on Saturday.
The victims were all Syrian citizens, NNA said, adding that a final toll of the strike would be announced after DNA tests were conducted to determine the identity of the victims.
The Israeli military said the airstrike targeted a weapons depot used by Hezbollah.
Hezbollah later said in a statement that it had struck the Ayelet Hashahar Kibbutz in northern Israel in retaliation for the Nabatieh strike.
Two soldiers were wounded in a rocket attack from Lebanon, the Israeli military said, adding that a total of 55 rockets had been fired in latest strikes from Lebanon.
Also on Saturday, an Israeli drone targeted a motorcycle in the Qadmous area east of Tyre in south Lebanon, NNA reported, adding that one person was injured. A security source said one person was killed in the motorcycle attack.
Tensions have soared in the region in recent weeks, after a deadly rocket strike in the Israeli-occupied Golan Heights that Israel blamed on Hezbollah. Israel responded with the killing of a top Hezbollah commander in the suburbs of Beirut.
Hezbollah has also vowed to retaliate against Israel, as has Iran, for the killing in Tehran of Hamas political chief Ismail Haniyeh.
