Since October 7 there have been near-daily cross-border exchanges of fire between Hezbollah and the Israeli army.

But Hezbollah has stepped up its rocket attacks on Israeli targets in recent days.

On Tuesday morning, a source close to the group told AFP an Israeli drone strike deep into Lebanon killed an engineer working for Hezbollah's air defense forces as he was traveling in a vehicle.

The strike hit the Abu al-Aswad area near the coastal city of Tyre, some 35 kilometers (22 miles) from the border, an AFP journalist reported.

The fighter's vehicle was completely burnt out.

Hezbollah said two of its fighters had been killed, one of them overnight.

The Israeli army said it had killed "two significant terrorists in Hezbollah's aerial unit" on Tuesday morning and overnight.

On Sunday evening, Hezbollah shot down an Israeli drone, both sides said.

Since October 7, at least 378 people have been killed in Lebanon, mostly Hezbollah fighters but also 70 civilians, according to an AFP tally.

Israel says 11 soldiers and eight civilians have been killed on its side of the border.