PLO cross-border raids against Israel grew during the late 1970s. One of the most severe—known as the Coastal Road massacre—occurred on 11 March 1978. A force of nearly a dozen Fatah fighters landed their boats near a major coastal road connecting the city of Haifa with Tel Aviv-Yafo. There they hijacked a bus and sprayed gunfire inside and at passing vehicles, killing thirty-seven civilians. In response, the IDF launched Operation Litani three days later, with the goal of taking control of Southern Lebanon up to the Litani River. The IDF achieved this goal, and Arafat withdrew PLO forces north into Beirut.