BEIRUT: Lebanese troops were deployed to Sunni areas of the capital as more sectarian violence erupted, stoking fresh fears after a top security official was killed in a bombing blamed on neighboring Syria.

The army said that it was determined to restore order, but the northern port of Tripoli was also shaken by fighting between partisans and opponents of Syrian President Bashar al-Assad that killed seven people.

On Monday afternoon personnel carriers entered Beirut’s Sunni district of Tariq Jdideh, which had been a hotspot all day. Soldiers took up position on streets leading into the district to keep them open, a military spokesman said.

Six people were wounded when the army made a pre-dawn sweep of Tariq Jdideh in pursuit of armed men, and automatic weapons and anti-tank rocket fire could be heard.

Later, soldiers responded after being fired on as they tried to clear a road into the district, a stronghold of opposition leader Saad Hariri. His supporters had blocked it despite calls by the former premier to stay off the streets.

In Tripoli, a Sunni bastion where opposition to Assad is strong, seven people were killed and 12 wounded during clashes between Sunnis and Alawites, an offshoot of Shiite Islam to which the Syrian president belongs, security sources said. Two Alawites and five Sunnis died.

The same sources reported snipers in the city late on Monday.

Clashes have erupted regularly in Tripoli as tensions spill over the border from Syria, where a 19-month-old anti-regime revolt has left more than 34,000 people dead.

Lebanon has been on edge since Friday, when police intelligence chief General Wissam al-Hassan died in the Beirut bombing.

The attack sparked immediate calls for Prime Minister Najib Mikati, whose cabinet is dominated by Syrian ally Hezbollah, to resign.

Hezbollah’s militia, which never disarmed after the 1975-90 civil war, is the most powerful military force in Lebanon.

Lebanon is a multi-faith country in which Christians, Shiite and Sunni Muslims each make up about one-third of the population.

Under a complex but unwritten arrangement, the president must be a Maronite Christian, the premier a Sunni and the speaker of parliament a Shiite.

Sunnis are furious over what they call the Syrian assassination of Hassan, also a Sunni, who was noted for pursuing alleged Syrian crimes in Lebanon including the 2005 assassination of Hariri’s father, Rafiq.

Sunday’s funeral for Hassan, who was intelligence chief of the Internal Security Forces, had been billed as an opportunity to protest against Syrian meddling in Lebanon. But the mood quickly turned to fury at Mikati.

After former premier Fuad Siniora, speaking at the funeral, joined calls for Mikati to resign, a
few hundred young men tried to storm the Serail, the seat of government. Police drove them back by firing in the air and using tear gas.

Mikati said on Saturday he would stay, at President Michel Sleiman’s request, to avoid a “political vacuum” in the volatile country.

Later, Hariri appealed to his supporters “to stay off the streets, because we want to oust this government by peaceful and democratic means”.

Clashes between Sunni and Shiite gunmen in Beirut in 2008 brought Lebanon close to a new civil war and there are fears it will be further destabilized by the conflict in Syria.

The envoys to Beirut of the United Nations Security Council’s permanent members met Sleiman and called for national unity.

US officials said on Monday they would send a team from the Federal Bureau of Investigation to help Lebanon investigate the Beirut car bombing.