This picture taken from southern Lebanon shows smoke rising after an Israeli strike between the villages of Qaouzah and Ramia near the border with Israel on December 4, 2023. AFP
In a statement, the army said "terrorists launched an anti-tank missile from Lebanese territory toward the area of Matat", while the emergency service Magen David Adom said in a separate statement that a 60-year-old man was brought to one of their teams nearby with no vital signs and declared dead.
"Additional launches from Lebanon toward Israel were also identified," the army said, adding its "helicopters, tanks and artillery are striking the sources".
Lebanese movement Hezbollah said in a statement that it had targeted the "Matat barracks" with "appropriate weapons and caused confirmed casualties".
Earlier in the day, the Israeli army reported "some launches" originating in Lebanon, adding that "fighter jets struck a series of Hezbollah" targets in response.
During a visit to Israel's north on Thursday to assess the situation along the border, Israeli Prime Minister Benjamin Netanyahu warned Hezbollah against seeking to widen the scope of his country's war with Hamas in Gaza.
"If Hezbollah chooses to start a global war, then it will turn Beirut and south Lebanon, not far from here, into Gaza and Khan Yunis with its own hands," he said, referring to areas that have seen heavy damage in the fighting.
On Tuesday, a Lebanese soldier was killed by Israeli fire on a military post near the border, the Lebanese army said, marking the first such death since hostilities along the frontier intensified after the Israel-Hamas war broke out.
Israel's army said in a post on X, formerly Twitter, that it had been trying to "eliminate" a Hezbollah threat and that the Lebanese army was "not the target of the strike".
Later Tuesday, Israeli shelling killed a Syrian labourer when it hit the chicken farm where he worked, according to Lebanon's National News Agency and a local official.
More than 110 people have been killed on the Lebanese side of the border since October, mostly Hezbollah fighters and more than a dozen civilians, according to an AFP tally.
Israel says nine Israelis have been killed in the area.