The health ministry said an "Israeli enemy drone strike" killed two people including a "seven-year-old" in Aita al-Shaab, and two other "Israeli" strikes killed five people in three other locations in the south.

Lebanon's state-run National News Agency said a "hostile drone" targeted a house in Aita al-Shaab with "two guided missiles".

The health ministry said Israeli strikes included a raid "on the village of Tayr Harfa that killed three people", with Hezbollah later mourning three fighters killed by Israeli fire, including a man from that same village.

A source close to the group, requesting anonymity, told AFP that the three fighters were killed in the Tayr Harfa strike.

Israel's army said its aircraft "eliminated" members of "a cell that was planning to fire projectiles from the area of Tayr Harfa".

On Friday morning, Hezbollah said it had targeted the northern Israel base of Meron "in response to the enemy's attacks on... southern villages and homes".

The threat of full-blown war grew after Iran and Hezbollah vowed to avenge the Israeli assassination last month of Hamas political leader Ismail Haniyeh in Tehran and top Hezbollah commander Fuad Shukr in south Beirut.

Cross-border violence since the Gaza war started has killed 600 people in Lebanon.

The Israeli authorities have announced the deaths of at least 23 soldiers and 26 civilians since the escalation began.

* This story was edited by Ahram Online.