The violence comes in spite of a deal reached in Qatar on May 21 that led to the election of Michel Sleiman, the head of the Lebanese army, as president.
However, the majority and the Hezbollah-led opposition have so far failed to agree on the formation a new national unity government.
Future movement officials earlier this month said they may withdraw from talks on the cabinet line-up, citing the violence.
"The clashes are continuing because both sides are acting irresponsibly," the army official said after the latest violence.
"If we don't reach a complete solution, there will always be potential for repeated clashes."
Zeina Khodr, Al Jazeera's correspondent in Lebanon, said: "No one can independently confirm what or who triggered the clashes but they were not the first in this area.
"The violence serves as a reminder of the dangers if reconciliation is not forged.