The killing of a Japanese schoolboy in the Chinese city of Shenzhen has sparked worry among Japanese expats living in China, with top firms warning their workers to be vigilant. Toshiba and Toyota have told their staff to take precautions against any possible violence,

A 10-year-old student at a Japanese school in China died Thursday after being stabbed on the way to school the day before, Japanese officials said.

About 50 Chinese residents in Japan and others held a vigil here on Sept. 19 for a boy who was stabbed to death on his way to a Japanese scho･･･