The Israeli military released a video on Tuesday claiming to show troops operating in southern Lebanon.
The army said in a statement a reserve division has begun limited operations against Hezbollah in southwestern Lebanon in an apparent widening of its ground incursion.
The military said Tuesday that the 146th Division is the first reserve division to enter Lebanon since it launched ground operations just inside the border last week.
The announcement came a day after the Israeli military warned residents to evacuate from over a dozen towns and villages in southwestern Lebanon, including the coastal town of Naqoura, where U.N. peacekeepers are headquartered.
Israel has called on people to evacuate several dozen communities across southern Lebanon, many of them north of a U.N.-declared buffer zone established after the Israel-Hezbollah war in 2006.
Israel says its operations are aimed at halting a year of Hezbollah rocket attacks so that tens of thousands of its citizens can return to their homes in the north.
Hezbollah has vowed to keep up the attacks until there is a cease-fire in Gaza.
The fighting, which escalated in mid-September, has displaced over 1 million Lebanese.
