Three Israelis and three Palestinians were killed in violence on Tuesday. A Palestinian terrorist killed two Israeli civilians and injured six near the Karni Crossing in the Gaza Strip before soldiers killed him. An Israeli army officer and two senior Hamas militants were killed in clashes in the West Bank city of Nablus. The Israeli officer was identified as Lt. Daniel Mandel, 24, of Alon Shvut. In another development, Palestinians said an Islamic Jihad militant was killed by Israeli fire near Rafiah, in the southern Gaza Strip.