Lebanese security sources told The Daily Star that two rockets fired from the Eastern Mountain Range hit an area between the Bekaa Valley towns of Labweh and Nabi Othman on Monday.
A Syrian man was slightly wounded in the midday attack, Labweh Mayor Ramez Amhaz said.
The Shia-populated region of Bekaa Valley has been targeted by rockets fired by anti-Syria militants over the past few months.
Lebanon has been rocked by the spillover of the conflict in Syria, with its north being the epicenter of fierce clashes between supporters and opponents of the Syrian government.
Syria has been gripped by crisis since March 2011. Damascus says the West and its regional allies have been fuelling the turmoil by providing militants with money and weapons.
According to some reports, more than 150,000 people have been killed due to the turmoil in Syria and a total of 7.8 million others have been displaced.
DB/