At least five people have been killed and 100 wounded in Lebanon's second-largest city. Firing assault rifles and rocket-propelled grenades, Lebanese gunmen have clashed in street battles as sectarian tensions linked to the 14-month-old uprising in Syria bled across the border for a third day. At least five people have been killed and 100 wounded in Lebanon s second-largest city since the gunbattles erupted late Saturday, security officials said. Residents say differences over Syria are at the root of the fighting, which pits neighbor against neighbor and raises fears of broader unrest that could draw in neighboring countries. Lebanon and Syria share a complex web of political and sectarian ties and rivalries, which are easily enflamed. Tripoli has seen bouts of sectarian violence in the past, but the fighting has become more frequent as the conflict in Syria worsens. The fighting camps break down along sectarian and political lines. On one side are Sunni Muslims who support the ...