The clash erupted after a fist fight between an Amal member and a follower of Hariri's Future movement in Noueri, an area in west Beirut.

The fight turned into clashes with machine guns, prompting the Lebanese army to intervene and arrest members from both groups.

Similar clashes between the two groups have erupted in Beirut for the past two days.

Meanwhile, four Molotov bombs were tossed near an office of the pro-Iranian Hezbollah in the Ras al-Nabaa area of Beirut.

Tension was mounting in Lebanon amid a political deadlock over the election of a successor for former president Emil Lahoud, whose term in office expired November 23.

The division was getting deeper between the opposition, led by Hezbollah, and the anti-Syrian majority, and many fear it could lead to civil strife in the country.

The rival political camps have agreed to elect Army Chief General Michel Suleiman as a compromise president, but are still at odds on the formation of the new government.