Earlier Monday, an Israeli airstrike killed at least seven civilians near the southern city of Sidon, Lebanese officials said.
The IDF in recent days had dropped leaflets on Sidon, urging civilians to evacuate.
Israel is attempting to establish a buffer zone between Israel and the Litani -- about 25 miles (40 kilometers) north of the border -- to halt the Hezbollah cross-border rocket attacks into Israel.
Lebanese Prime Minister Fouad Siniora said Monday that one person was killed in an Israeli airstrike on the southern village of Houla, not 40 as he had earlier reported.
"The massacre in Houla, it turned out that there was one person killed," Siniora said. "They thought that the whole building smashed on the heads of about 40 people. ... Thank God they have been saved."