sentences:  Lebanese forces fired artillery barrages against militants in the camp.In response, the Lebanese army brought in reinforcements and on 20 May began a steady barrage of artillery and heavy machine gun fire in an attempt to hit militant positions that Fatah al-Islam had occupied inside the Nahr al-Bared camp.On 20 May, a spokesperson for Fatah made an official statement to the WAFA Palestine News Agency affirming that the "so called Fatah al-Islam" is neither part of, nor linked to, the Fatah organization or the PLO.