The move comes after the Israeli military killed a senior Hezbollah commander in a strike on central Beirut, which the militant group responded to with defiance.
The Israeli military have announced a reserve division has begun conducting limited operations against Hezbollah in southwestern Lebanon, in an apparent widening of its ground incursion into the country.
The Israeli Defence Forces (IDF) said that the 146th Division was the first reserve division to enter Lebanon since Israeli troops entered Lebanese soil last week.
Israel has ordered residents in dozens of Lebanese towns to evacuate as it continues to push into Lebanon in a serious escalation of the conflict in the Middle East.
The IDF claim their incursion is necessary in order to halt a year of rocket attacks from Hezbollah so that citizens impacted in the north could return to their homes. Hezbollah have refused to halt attacks until a ceasefire in Gaza is implemented.
The announcement comes as the IDF said it killed a senior Hezbollah commander in another strike on Lebanon's capital of Beirut Tuesday morning.
Suhail Hussein Husseini, who the IDF said was responsible for overseeing logistics, budget and management of Hezbollah, was killed after Israeli fired rockets in a targeted strike on Beirut.
Husseini was also responsible for transferring advanced weapons from Iran to different units within the militant group and was a member of Hezbollah's military council, according to the IDF.
Hezbollah's acting leader, Sheikh Naim Kassem, said in a defiant televised statement following the strike that the group's military capabilities were still intact, warning that more Israeli citizens would find themselves displaced as Hezbollah intends to push further into Israel.
Israeli forces have been repeatedly targeting Lebanon, killing several high-ranking commanders — including the group's leader, Hassan Nasrallah.
Hezbollah have insisted that they have already replaced their slain commanders and vowed to keep fighting against Israel until a cease-fire in Gaza has been achieved.
Last week, Israel launched what it says is a limited ground incursion into southern Lebanon in what officials fear is an escalation of the war which has dragged on between Israel and Hezbollah's ally, Hamas, for one year.
On the day of the one-year anniversary of 7 October, the date which sparked the war between Israel and Hamas, Palestinian militants fired a barrage of rockets into Israel.
The war began after Hamas-led militants launched a terror attack in Israel, killing some 1,200 people and abducting another 250.
Israel has retaliated by vowing to destroy Hamas in the Gaza strip, killing around 42,000 people, according to local officials and displacing around 90% of its population in its process.
The conflict has spread in the region, with Israel now attacking Hezbollah in Lebanon and contending with Iran — who launched a barrage of missiles across Israel last week.
A ceasefire deal which has been backed by the US has repeatedly faltered, with both Israeli Prime Minister Benjamin Netanyahu refusing the back down in Gaza and Hamas insisting on the end of hostilities.
"As long as our hostages are in Gaza, we will continue to fight. We will not give up on any of them. I won’t give up," Netanyahu said in a recorded message late Monday in a government memorial service marking the 7 October attacks.