The flare-up brings to 16 the total killed so far, security
sources said, in the most serious spillover into Lebanon since
Syria's civil war began three years ago. An unknown number of
civilians and militants have also been killed in the fighting.
An eight-year-old girl was shot dead overnight in Tripoli.
Clashes began on Saturday after security forces arrested an Islamist
commander popular with local rebels who frequently use the porous
border to move in and out of Syria. Shortly after the arrest, gunmen
attacked security forces in the area.
Lebanese security officials say the fighters include members of al
Qaeda's Syria branch, the Nusra Front, and an al Qaeda splinter
group, the Islamic State, which has seized swathes of land in Syria
Although Lebanon - a country of about 4 million, bordering Israel -
has avoided the full-scale war afflicting Syria and Iraq, regional
conflicts have rekindled decades-old tensions.
Tripoli has seen frequent clashes between local Sunni Muslims and
members of the Shi'ite-derived Alawite minority, and on Monday night
fighting broke out after news that several Sunni clerics had been
wounded as they entered Arsal to try to broker a ceasefire between
the army and the militants.
Men blocked several Tripoli roads on Tuesday, and most shops were
closed and streets empty after militants opened fire on a bus
carrying soldiers, wounding at least six.
Gunmen had also fired on several army positions throughout the port
city overnight, the National News Agency said. A girl was killed
when a bullet hit her in the head.
Syrian activists and medics in Arsal say fighting has badly damaged
the camps that are home to many of the tens of thousands of Syrian
refugees estimated to live in and around the town.
"The situation is bad. Families are blockaded inside the city.
Refugees are on the streets. There is a severe shortage of bread.
The medical situation is very bad," said a Syrian witness via text
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Fighting had started again in Arsal, a mainly Sunni town, around 7
a.m. (0400 GMT) as the army tried to retake a number of buildings
seized by militants, the National News Agency said.
While Lebanon has officially tried to distance itself from Syria's
conflict, its powerful Shi'ite movement Hezbollah has sent fighters
to aid President Bashar al-Assad, an Alawite. Assad, like Hezbollah,
is backed by Shi'ite power Iran.
The rebels fighting to overthrow Assad are overwhelmingly Sunni and
have received support from regional Sunni powers including Saudi
Rocket fire, suicide attacks and gun battles connected to Syria's
war have plagued Lebanon and the conflict has worsened Lebanon's
perennial political deadlock between officials divided largely along
More than 170,000 people have been killed in Syria's war, which
started in 2011 as a peaceful protest movement, then degenerated
into civil war after a government crackdown.
(Editing by Louise Ireland)
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