KHAN YUNIS, Gaza Strip (AP) Palestinian militants killed three Israeli soldiers Saturday in a daring raid on an army outpost in the southern Gaza Strip, and three Israeli civilians were shot dead when their car was ambushed near Jerusalem. The deaths prompted Israel to send tanks, armored personnel carriers and bulldozers into Palestinian areas in the Gaza Strip. The Israelis destroyed a security building and several security checkpoints before withdrawing early today. Three Palestinians were also killed