Syrian warplanes bombed areas of Syria near the Lebanese border on Monday, a Lebanese military spokesman told AFP.
"There was bombing on Syrian territory, not Lebanese territory," the spokesman said.
Earlier, inhabitants of Arsal, a border region in Lebanon's Bekaa Valley, told AFP they saw Syrian planes flying over the area at dawn.
Syrian rebels and their sympathisers often carry out operations inside Syria before crossing back over the porous and sometimes undefined border into Lebanon.
Moreover, shelling from Syria into Lebanon and cross-border shootings have become near-daily occurrences in recent months.
Lebanese officials have protested only twice to Damascus, whose troops withdrew from Lebanon in 2005 after three decades of occupation.
More than 150,000 Syrians are said to have fled to Lebanon where factions for and against Syrian President Bashar al-Assad's regime are deeply divided.
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