No casualties or damage were reported following the rocket attack, which took place at 12:50 p.m Tuesday.
Border areas in east and north Lebanon have been frequent targets of aerial and artillery shelling from Syria since the crisis began in the neighboring country three years ago.
Lebanon has also seen increasing clashes linked to the Syrian crisis, particularly in the northern city of Tripoli, where scores of people have been killed, and more recently in Beirut.
The country has also been plagued by a wave of car bombings carried out by terrorist groups backing war in Syria.
BA/BA