Israeli Defence Minister Israel Katz said Sunday that the army had been ordered to destroy more bridges over Lebanon's Litani River that are allegedly being used by Hezbollah in the country's south, and to step up the demolition of houses.

Lebanon was pulled into the Middle East war when Hezbollah began firing rockets into Israel on March 2 to avenge the killing of Iran's supreme leader Ali Khamenei in Israeli-US attacks.

Israel has sent troops into Lebanon and carried out extensive airstrikes in the country, while Hezbollah continues to fire rocket barrages across the border.

Israel's ZAKA 360 emergency response unit said a person was pronounced dead after a strike on their vehicle "carried out by a rocket fired from Lebanon".

Local firefighters said flames had engulfed two vehicles after a "direct hit" in the northern Israeli kibbutz community of Misgav Am.

"We arrived at the scene and saw two vehicles on fire. During the firefighters' extinguishing operations, we identified a man in the driver's seat," paramedics from Israel's Magen David Adom emergency medical service said.

Iran-backed Hezbollah said in a statement that its fighters targeted "a gathering of Israeli enemy soldiers" in Misgav Am "with a rocket barrage".

It was among a series of attacks the group claimed on Sunday, mainly against Israeli troops in northern Israel and in southern Lebanon, where Israeli soldiers have been carrying out ground incursions.

- Bridges -

Defence minister Katz said in a statement that he and Israeli Prime Minister Benjamin Netanyahu instructed the military "to immediately destroy all the bridges over the Litani River that are used for terrorist activity, in order to prevent Hezbollah terrorists and weapons from moving south".

The Litani River runs around 30 kilometres (20 miles) north of the Israeli border.

Israel's army warned it would strike a bridge on a highway north of the city of Tyre.

On Wednesday, Israel attacked two bridges spanning the Litani, also alleging they were being used by Hezbollah.

Katz said the military was also instructed to "accelerate the demolition of Lebanese houses in the contact villages in order to thwart threats to Israeli communities".

On Sunday, Lebanon's state-run National News Agency reported Israeli strikes in several areas of south Lebanon, including in the strategic town of Khiam and the coastal border town of Naqura, and a raid in the Bekaa Valley in the country's east.

Hezbollah said its fighters repeatedly targeted Israeli soldiers and vehicles in or near the border town of Taybeh, as well as in or near Khiam, where the group has repeatedly said it has targeted Israeli forces in recent days.

Lebanese authorities have said more than 1,000 people have been killed in the country and more than one million others displaced in three weeks of conflict.

Two Israeli soldiers have been killed in southern Lebanon, according to the military.

On Saturday, Hezbollah said its fighters clashed with Israeli forces in Khiam and in Naqura.

The group also claimed attacks on northern Israel on Saturday, including targeting an air defence system in Maalot-Tarshiha, where Israeli public broadcaster Kan 11 reported three people were lightly wounded.

Israel has warned residents of swathes of south Lebanon to evacuate and has said it wants to create a buffer zone in Lebanon to protect residents of north Israel.