Five fighters from Hezbollah and its allied Amal movement were killed during Israeli raids on southern Lebanon during the night from Thursday to Friday, the two groups announced.
These strikes come after deadly violence in the border region, where exchanges of fire between Israel and Hezbollah have intensified and raised fears of an escalation.
According to the official National News Agency (ANI), the Israeli air force carried out strikes during the night on five villages in the south of the country.
The Shiite Amal movement, led by Parliament Speaker Nabih Berri, deplored the death of three of its members, killed in a strike on a house in the village of Al-Qantara.
Hezbollah, for its part, announced the death of two of its fighters.
This brings to twelve the number of members of the powerful movement supported and armed by Iran killed since Wednesday.
The Islamist group announced Thursday evening that it had fired dozens of rockets into northern Israel, in response to Israeli raids which left 15 dead the day before.
A speech from Hassan Nasrallah expected
Ten civilians and five members of Hezbollah, including a military leader, were killed.
On the Israeli side, a soldier died in a rocket attack from Lebanon which was not claimed.
Wednesday was the bloodiest day since the exchange of fire on the border between Hezbollah and the Israeli army began more than four months ago.
Hezbollah opened the southern Lebanese front to support its ally, Palestinian Hamas, at war against Israel in the Gaza Strip since the Islamist movement's unprecedented attack in southern Israel on October 7.
Hezbollah Secretary General Hassan Nasrallah is due to deliver a new speech on Friday, the second this week.
In more than four months, at least 268 people, mostly fighters from Hezbollah and other allied groups but also 40 civilians, have been killed in southern Lebanon, according to an AFP count.
On the Israeli side, ten soldiers and six civilians were killed, according to the army.