The Lebanese army carried out raids in the northern city of Tripoli on Thursday after a soldier was killed in a drive-by shooting, the state-run National News Agency and a radio station said.
NNA said two masked men riding a motorcycle killed Fadi al-Jubaili, an army warrant officer, at 6:30 am after opening fire on him in the area of Boulevard.
Voice of Lebanon radio (93.3) said the military carried out raids in the area to arrest the suspects.
On Wednesday, an 11-year-old boy was killed from sniper fire in Tripoli.
The clashes renewed after an Alawite resident from the Jabal Mohsen neighborhood died when unknown assailants opened fire at him near al-Ridani bakery, NNA said.
Tripoli has been rocked by repeated bouts of violence linked to the conflict in neighboring Syria, pitting its Sunni majority, who largely support the rebels against the Alawite minority, who back President Bashar Assad.
Alawites make up 11 percent of the city's population. Sunnis account for 80 percent.
The Lebanese army, who has deployed in the city to calm the situation, has come under fire from gunmen from both sides. Several soldiers have been killed and injured in the different rounds of fighting that the city has witnessed.