Lebanon's health ministry said Israeli strikes on Sunday killed four people in the south, while Israel said it carried out raids after Hezbollah launched drones at its soldiers.
The ministry reported two people killed in south Lebanon's Nabatieh al-Fawqa and two women killed in Arab Salim nearby. Twenty people were also wounded in several locations, including women and three children.
The Israeli military earlier said it was carrying out strikes in southern Lebanon after Hezbollah launched drones at its soldiers, and urged residents of the town of Arab Salim to evacuate.
The Israeli army said in statement that “terrorists from the Hezbollah terrorist organization launched two drones” towards the Israeli army “operating in the Security Zone in southern Lebanon” and that the military in response is now striking in southern Lebanon. It added that there were no reports of Israeli soldiers wounded.
In another message, the Israeli military warned residents of Arab Salim to leave ahead of imminent attacks.
"You are situated near a facility belonging to the terrorist organization Hezbollah, against which the Israeli army will be operating," it wrote in Arabic on Telegram.
Lebanon was drawn into the Middle East war in March after Iran-backed Hezbollah attacked Israel, which responded with airstrikes and a ground invasion that Lebanon says have killed more than 4,300 people.
Violence has lessened since a US-Iran memorandum of understanding on the broader conflict in June and a framework agreement between Israel and Lebanon later that month.
Israeli forces are operating inside a self-declared "security zone" around 10 kilometers (six miles) deep inside Lebanon along the border.
Authorities in Lebanon said on Saturday that Israeli strikes killed four people in the country's south and east.