Lebanon's prime minister, Fuad Siniora, says military forces are working to enforce the government's authority in southern Lebanon.
Mr. Siniora warned Thursday that troops will confiscate weapons they find in the area, which is home to Hezbollah militant bases.
Thousands of Lebanese troops have deployed in southern parts of the country, after the end of fighting last month between Hezbollah and Israel.
Hezbollah leaders say fighters continue to operate along the border with Israel, to defend what they call land belonging to the group.
A United Nations resolution to end the fighting has called for Hezbollah fighters in Lebanon to be disarmed.
Syria and Iran are believed to be key suppliers of weapons and money to Hezbollah.
Some information for this report was provided by AFP and AP.