A woman and two children were reportedly among four people killed in a wave of Israeli raids on southern Lebanon.
Security sources told Reuters news agency that the deaths occurred during Israeli raids on a village.
The sources said that 11 people were injured in southern areas, and that the extent of the damage was “huge.”
Lebanon's powerful Hezbollah militant group said a strike on a separate town killed one of its fighters.
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Media reports in Lebanon stated that buildings caught fire after the Israeli attacks.
An Israeli government spokesman said that the raids were launched after a woman was killed and eight other people were wounded in a missile attack launched from Lebanon on the Safad area in northern Israel, where a military base was also hit.
Hezbollah is believed to be behind the initial missile attack, but has not claimed responsibility.
The armed group did not announce any operations on Wednesday, but the head of its Executive Council warned that Israeli attacks “cannot go unanswered.”
The Israeli army said in a statement: “A short while ago, Israeli army fighter jets bombed a series of Hezbollah terrorist targets in the areas of Jabal al-Bureij, Al-Huna, Donin, Adshit, and Al-Sawwanah.
“Among the targets struck were military complexes, operations control rooms and terrorist infrastructure used by Hezbollah terrorists.
He added, “Several targets belong to Al-Radwan forces.”
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The cross-border bombing killed more than 200 people in Lebanon, including more than 170 Hezbollah fighters, as well as about a dozen Israeli soldiers and some Israeli civilians.
Hezbollah and the Israeli army have been exchanging fire for more than four months.
This came after the militant group fired rockets across the disputed border in support of its Palestinian ally Hamas, which launched a deadly attack on Israel last October.
The exchange of fire also led to the displacement of tens of thousands of people in the border areas of both countries.