The Lebanese military says its troops have fired on Israeli warplanes flying low over south Lebanon but no hits were reported.
A military statement says four Israeli warplanes violated the airspace in southern Lebanon on Tuesday. This drew anti-aircraft fire from Lebanese gunners, which "forced the planes to fly at a higher altitude."
There was no immediate comment from the Israeli military.
Israeli warplanes frequently fly over Lebanon on reconnaissance missions and the Lebanese have fired on them on several occasions since a U.N.-brokered cease-fire ended a monthlong war between Israel and Hezbollah in August 2006.
The incident comes two days after U.N. peacekeepers found an explosives cache just 2.5 miles (4 kilometers) from the Israeli border.