Violence between supporters of opposing Syrian groups has killed 6 people and injured 40 in the Lebanese capital Tripoli.
Existing sectarian tensions in Lebanon have increased since the escalation of the conflict in Syria.
Groups of young men were seen firing machine guns and rocket propelled grenades at each other in the Bab al-Tabbana area.
The BBC reported that a group of 14 Lebanese and Palestinian men from the area, who appear to have joined the rebellion, were recently killed by the Syrian army in a Syrian border town.