"The army raided the houses of several people who were involved in the shooting incident and found in one of the residences a number of hand grenades, ammunition, several telecommunications devices, Syrian and Lebanese license plates and military gear," said a military statement published Sunday by the Daily Star newspaper in Lebanon.
The report provided no details on the shooting or whether there were deaths or injuries.
Lebanon's national security has come under threat from war in neighboring Syria.
The threat level escalated last year when Hezbollah admitted to fighting alongside pro-government forces in Syria, sparking retaliatory attacks in Lebanon against the Shiite movement.
Notable deaths of 2014 [PHOTOS]