Israeli troops killed four Palestinian militants who attempted to cross through the perimeter fence from the Gaza Strip on Saturday, and in the West Bank arrested members of a Palestinian cell suspected in the killing of an off-duty soldier this week. The army said in a statement that militants who killed Dvir Sorek, 18, outside a settlement near Hebron were arrested and the car they used in the attack was seized. Israel's Channel 13 TV reported that the suspects included two brothers from Hebron.