An explosion has rocked a Muslim neighborhood in Lebanon's capital, as Lebanese troops and Islamic militants continue to fight fierce battles at a Palestinian refugee camp to the north.
Television footage (CNN) showed widespread damage late Monday in the Muslim district of Verdun in western Beirut. Witnesses say the blast set cars ablaze and damaged buildings.
Police say at least six people were wounded.
On Sunday, an explosion in a Christian sector of Beirut killed one person and wounded at least 10 others.
Meanwhile, Lebanese forces and a militant group suspected of having ties to al-Qaida battled for a second day at a Palestinian refugee camp in the northern city of Tripoli.
More than 50 people have been killed in the fighting.
Lebanese tanks and artillery pounded militants in the, Nahr el-Bared refugee camp. Medical workers say the shelling killed nine Palestinian civilians Monday.
The militant group, Fatah al-Islam, warned it would expand the fight beyond Tripoli unless troops stopped the bombardment.
In Washington, a U.S. State Department spokesman, Sean McCormack said Lebanese security forces are working in a "legitimate manner" against what he called "violent extremists." The European Union voiced concern over the violence.
The battles in Tripoli are said to be the worst internal fighting since Lebanon's 15-year civil war ended in 1990.