Israeli forces have advanced into a number of towns and villages in south Lebanon, a source from the UN peacekeeping force in the country, UNIFIL, told AFP on Wednesday.
"Israeli forces are present today in several villages, including Kfar Kila, Houla, Kfar Shouba, Yaroun and Khiam," he said.
Khiam, the deepest point listed, is about six kilometers away from the border.
The Israeli military ordered the evacuation of a swathe of southern Lebanon on Wednesday, telling residents to move north of the Litani River on a third day of full-blown hostilities with Hezbollah.
While Israel has already warned residents to leave dozens of villages in southern Lebanon, Wednesday's evacuation order was the broadest yet.
Israeli Defense Minister Israel said on Tuesday he had authorized the military to advance and take control of additional positions in Lebanon, where Israeli troops have held several hilltops since a war with Hezbollah in 2024.
Israeli strikes have killed dozens of people in Lebanon since Monday, according to the Lebanese health ministry. Many thousands of Lebanese have already fled their homes.
The war in the Middle East spread to Lebanon on Monday, when Hezbollah opened fire, saying it aimed to avenge the killing of Iranian Supreme Leader Ali Khamenei in the US-Israeli attack on Iran.
Hezbollah announced several attacks on Wednesday, including one using what it described as a precision-guided missile that it said was fired at a military facility in northern Israel.
Israeli military spokesperson Effie Defrin said the Israeli military had attacked more than 250 Hezbollah targets throughout Lebanon over a 48-hour period.