JOHANNESBURG, South Africa - Hundreds of looters battled police all weekend at the site of a beer train wreck in violence that left one woman dead, South African police said on Monday as they kept a heavy guard on the remaining alcohol.The train carrying 180,000 crates of beer from South African Breweries derailed on Friday night near Waterval Boven, 124 miles east of Johannesburg, Superintendent Izak van Zyl said.By Saturday morning, police were battling up to 200 people from the nearby township trying to make off with crates of beer.