Israel's military has called up more troops to Lebanon, an Israeli security official said.

The official, who spoke on condition of anonymity in line with regulations, said Tuesday the military had called up an additional battalion to Lebanon, hours after Israeli Prime Minister Benjamin Netanyahu said he had authorized more intensive strikes across Lebanon.

Israel's military clashed with Hezbollah Tuesday along a strategic river in Lebanon as Israeli troops tried to push farther north, just three days before Lebanese and Israeli military delegations are set to meet for direct talks in Washington.

A previously reached ceasefire appeared more nominal by the day, complicating efforts at a broader peace in the Iran war, as Tehran wants an end to the fighting to include Lebanon.

An airstrike on the Amal-affiliated Risala Scout Association center in Srifa killed two people on Tuesday, including a paramedic.

The Israeli army also struck Tuesday several towns and villages in south Lebanon, including Kafra, Barish, Srifa, Shohour, Dweir, Majdal Selem, Kawthariyet al-Rez, Arnoun, Yohmor-Shqif, al-Rihan, Zawtar al-Sharqiya, Tyre's Ras el-Ein, Tayrfelsay, Harees, Kherbet Selem, Habboush, Zebdine, Kfartebnit, al-Kharayeb, al-Sahrqiyeh, al-Sultanieh, Deir Ntar, Mayfadoun and Arzoun.

Eight Israeli airstrikes hit the outskirts of Mashghara in West Bekaa on Monday evening as other strikes hit the southern towns of Shhour, Rishknanay, Arab Salim and Habboush and many villages in the Nabatieh district, as residents heavily fled Beirut's southern suburns, after Israeli PM Benjamin Netanyahu ordered the army to escalate against Hezbollah in response to drone attacks.

"Washington is discussing with Tehran a ceasefire in Lebanon on the condition of reining in Hezbollah," an Israeli source told Al-Arabiya.

A senior U.S. official on Monday hinted that the Trump administration would support an escalation in Israeli military action in retaliation to "Hezbollah's violations of the ceasefire," U.S. news portal Axios said.

"Hezbollah has ignored repeated requests to stop firing at Israel, including a recent ultimatum. Israel will never be expected to passively absorb attacks on its forces and civilians. This is not the Biden Administration," the official told Axios.

The Israeli army intensified strikes in southern Lebanon on Monday, as Israeli Prime Minister Benjamin Netanyahu said he had ordered the military to escalate its offensive in Lebanon in an effort to "crush" Hezbollah.

The airstrikes come as the United States and Iran seek to finalize the terms of an agreement to end the Middle East conflict, which could include the Lebanon front, where Israel and Hezbollah have waged war since March 2.

At a busy Beirut center, migrant volunteers stirred pots of okra soup and shaped balls of the African staple fufu, keeping food coming for those caught between the latest Israel-Hezbollah war.

Israel's two far-right ministers on Monday called for an escalation of military operations in Lebanon, with one advocating strikes on Beirut in response to Hezbollah's drone attacks.

Israeli Chief of Staff Eyal Zamir said in a limited security meeting on Sunday night that "buildings in Beirut should be attacked in response to Hezbollah's drone attacks," Israel's public broadcaster quoted informed sources as saying.

U.S. Secretary of State Marco Rubio said Monday that a deal to end the war with Iran could materialize "today", adding that Israel had the right to defend itself against attack.

"We thought we might have some news last night, maybe today, I wouldn't read too much into it," Rubio said in New Delhi, referring to the potential agreement.