Lebanese artillery units have been firing shells into the Nahr al-Bared Palestinian refugee camp in the north of the country after two soldiers were killed by al-Qaeda inspired militants.The army have been battling the fighters of Fatah al-Islam there for nearly eight weeks. There is precious little of the camp left. Lebanese guns attacked the camp from all sides, unleashing up to 10 rounds a minute. It is the most ferocious upsurge of violence since the end of June, when Lebanon’s defence minister declared that major combat operations there had ended. The army says it is not a final push to root out the remaining militants, but security sources say military leaders are concerned about being sucked into a war of attrition. More than 200 people have been killed since the fighting began.