Israeli Prime Minister Benjamin Netanyahu on Tuesday reaffirmed that his country was "intensifying" its operations in Lebanon, a day after at least 11 people were killed in a strike in eastern Lebanon.

An AFP correspondent in Nabatieh reported airstrikes following the warning on Tuesday and saw plumes of smoke rising from various locations within the city.

Lebanon's state-run National News Agency said one of the strikes hit the vicinity of a public hospital, causing "significant damage to the hospital's departments".

An Israeli military official told AFP that troops had begun operating beyond the Israel-announced "Yellow Line" in south Lebanon, which runs around 10 kilometres (six miles) deep inside Lebanese territory.

As Israel's operations moved deeper into south Lebanon, Hezbollah said its fighters confronted Israeli troops trying to advance into a town that overlooks Nabatieh city on Tuesday.

Hezbollah said in a statement that its fighters repelled an Israeli force early Tuesday that had moved toward Zawtar al-Sharqiyah after airstrikes and heavy artillery fire.

The group said it used drones and was fighting with Israeli soldiers in the town.

Largely deserted since the start of the latest Israel-Hezbollah war on March 2, Nabatieh has faced relentless strikes despite an April 17 truce.

Avichay Adraee, the Israeli military's Arabic-language spokesman said on X on Tuesday that residents of the entire city "must evacuate your homes immediately and move north of the Zahrani River".

In eastern Lebanon, the health ministry said "yesterday's Israeli enemy airstrike on the town of Mashghara in West Bekaa resulted in a preliminary toll of 11 martyrs, including two girls and a woman, and 15 wounded, including a child".

Rescuers were still clearing the rubble in the eastern town, the ministry added.

The Israeli military in a statement said it launched "several strikes... in the area of Mashghara" on "Hezbollah infrastructure sites where terrorists' activity was identified".

Later on Tuesday, it issued an evacuation warning for the town as well as Sohmor near it.

It then issued other warnings for several southern towns and villages in the south.

Lebanon's state-run National News Agency (NNA) also reported several Israeli strikes across the south and east.

A strike on Srifa in the south killed a rescuer and wounded two others from the Risala Scouts association, linked to the Hezbollah-allied Amal movement, according to the health ministry, raising the rescuer death toll in the war to 120.

- Drone attacks -

Several strikes also hit near Lebanon's largest dam in the Litani river's Qaraoun lake in the east.

The Litani River Authority issued a statement warning that "any direct or indirect targeting of the Qaraoun Dam or its facilities could lead to catastrophic risks for residents, infrastructure, and vital installations in the areas downstream".

It called on the president, prime minister and government to "make the necessary contacts and take the necessary actions at the international and diplomatic levels to protect the Qaraoun Dam... from any attacks".

The Israeli military said on Tuesday it had bombed more than 100 Hezbollah targets across Lebanon overnight.

The Iran-backed movement also claimed drone attacks on an Israeli army barracks in northern Israel on Tuesday.

The Israeli army on Tuesday said it "intercepted several explosive drones launched by the Hezbollah terrorist organization toward Israeli territory".

"Several additional explosive drones fell within Israeli territory, adjacent to the Israel-Lebanon border," it added, saying no injuries were reported.

Netanyahu on Tuesday said his country was intensifying operations in Lebanon.

"The (Israeli army) is operating with substantial forces on the ground and securing strategically dominant positions. We are reinforcing the security buffer zone in order to protect the communities of northern Israel," he added.

He had ordered on Monday "an even greater acceleration of our operations" against Hezbollah.

Israel has repeatedly bombed Lebanon despite a truce in its war with Hezbollah, saying it is targeting the group, while the latter has claimed several attacks on Israeli positions in southern Lebanon and Northern Israel.

Lebanese authorities say more than 3,100 people have been killed by Israeli strikes since March 2, when Hezbollah drew Lebanon into the Middle East war by attacking Israel in support of its backer Iran.