The largest attack since the death of Yasser Arafat claimed the lives of five Israeli soldiers on 12 December, wounding ten others. Approximately 1.5 tons of explosives were detonated in a tunnel under an Israeli military-controlled border crossing on the Egyptian border with Gaza near Rafah, collapsing several structures and damaging others. The explosion destroyed part of the outpost and killed three soldiers. Two Palestinian militants then penetrated the outpost and killed two other Israeli soldiers with gunfire. It is believed that Hamas and a new Fatah faction, the "Fatah Hawks", conducted the highly organised and coordinated attack. A spokesman, "Abu Majad", claimed responsibility for the attack in the name of the Fatah Hawks claiming it was in retaliation for "the assassination" of Yasser Arafat, charging he was poisoned by Israel.