An Israeli drone targeted Wednesday a car in the city of Sidon near the Ain el-Helweh camp, hours after another drone strike on a car in the southern town of Beit Leef killed a Hezbollah fighter.
In response to the Beit Leef strike, Hezbollah targeted the Hadb Yaroun post in northern Israel.
The group also targeted Israeli soldiers in the Zar'it barracks with artillery shells.
Sources told Saudi Al-Arabiya news channel that the man targeted in Sidon is Khalil al-Maqdah, the brother of Fatah Movement official Mounir al-Maqdah.
Hezbollah had launched Wednesday more than 50 rockets on the Israeli-annexed Golan Heights in response to a midnight strike on Bekaa that killed a Hezbollah fighter and injured 20 people.
An Israeli army spokesman accused Hezbollah of "firing indiscriminately at Israeli civilians" in the Golan's Katzrin, warning that Israel will act to "protect its citizens."
Four Hezbollah fighters were also killed Tuesday in the southern border village of Dhayra and two Syrian civilians, including a shepherd, were killed Wednesday in Israeli shelling on al-Wazzani and the outskirts of al-Khiam.
Israeli artillery shelled Wednesday al-Litani and the outskirts of Deir Mimas in south Lebanon.
Warplanes and drones had raided overnight the southern border towns of Aita al-Shaab, Houla, Alma al-Shaab, al-Naqoura and Wadi Hamoul.