The motive for the attack was not immediately known . Xinhua : four dead , four children and three others wounded . Xinhua : Police find two-foot ( 60-centimeter ) knife that Xinhua said he used . Motive for attack not immediately known . The 26-year-old man tells police he was responsible .
Xinhua : four dead , four children and three others wounded . Xinhua : Police find two-foot ( 60-centimeter ) knife that Xinhua said he used . Motive for attack not immediately known . The 26-year-old man tells police he was responsible .