The deaths added to tensions in the area which has seen an escalation of violence in recent days. The civil war in Syria has increasingly spilled over into Lebanon with almost daily reports of cross-border shelling or gunfire in border areas.
The United Nations says at least 70,000 people have been killed since the uprising against Assad’s authoritarian rule began nearly two years ago.
Efforts to stop the bloodshed so far have failed, leaving the international community at a loss of how to end the civil war.
A senior opposition leader said Sunday that his umbrella group has suspended participation in meetings with its Western backers and their Arab allies because of their indifference over the regime’s attacks on the Syrian people in Aleppo and other cities.
‘‘Assad has reached the stage of real genocide amid Arab silence and we renounce that,’’ George Sabra, vice president of the Syrian National Coalition, said in Cairo after meeting Arab League chief Nabil Elaraby.
On Friday, the Coalition said its leaders would not travel to Washington or Moscow for any talks to protest the international community’s ‘‘silence over crimes committed by the regime.’’ It also said opposition leaders would boycott a meeting next month in Rome of the Friends of Syria, which includes the United States and its European allies.
In Washington, the State Department condemned rocket attacks on Aleppo, saying in a statement late Saturday the strikes are the ‘‘latest demonstrations of the Syrian regime’s ruthlessness and its lack of compassion for the Syrian people it claims to represent.’’
Associated Press writers Ryan Lucas in Beirut and Lori Hinnant in Paris contributed to this report.