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Beijing, China (CNN) -- The death toll from an attack at a kindergarten in northwestern China rose to nine Wednesday after one of the wounded victims died, state media said. A man with a kitchen cleaver hacked to death a teacher and seven kindergarten students -- five boys and two girls. He then returned home and committed suicide, state media said. The teacher's mother, who was wounded in the attack, later died at a hospital -- bringing the toll to nine, the Xinhua news agency said. Officials do not yet know what prompted the 48-year-old man to attack students at a private school in Shaanxi province. It was at least the fourth such attack on school children in the last month. In addition to the fatalities, 11 children were wounded in the attack. Among them were two children who were hospitalized in serious condition, Xinhua said. Twenty children attended the school. China has seen a spate of attacks at schools in recent days. On April 30, a man armed with a hammer injured five pre

BEIJING (AP) -- The "Watercube" swimming venue -- an iconic, futuristic structure for the 2008 Olympics that looks like a building covered in bubble wrap -- was unveiled Monday in Beijing. Beijing Olympic organizing committee president Liu Qi and Beijing Mayor Guo Jinlong both dipped their hands into the competition pool and seemed satisfied at the brief unveiling ceremony. Guo even put the pool water to his lips. Known officially as the National Aquatics Center, the Watercube has been dubbed the "cool" building of the Games because of its translucent, blue-toned outer skin that makes it look like a cube of bubbles. Forty-two gold medals will be up for grabs at the venue during the Olympics, which start Aug. 8. American Michael Phelps will be out to break Mark Spitz's record of seven gold medals. He just missed the mark in 2004, winning six in Athens. "There are many different buildings in the world, and I believe this could be one of the most significan

Construction began Monday on what was expected to be the world's tallest Ferris wheel, which will soar 680 feet (207 meter) over the Chinese capital when it is complete. The $99 million Beijing Great Wheel was supposed to be open to tourists at next summer's Olympic Games, but the project had been delayed by a number of design changes. The Ferris wheel was being built in eastern Beijing's Chaoyang Park, which is also the venue for beach volleyball in the Aug. 8-24 Olympics. It will have 48 air-conditioned compartments each of which can carry up to 40 passengers. It is expected to be completed in 2009.