Tragedy Strikes Chinese Holiday: 12 Dead in Explosion and Helicopter Crash.

At least nine workers died in an explosion at a petrochemical plant in Liaocheng, China, while three others were killed in a helicopter crash near Xi'an during the May Day holiday. The cause of both incidents is under investigation. Two earthquakes in the southwest of the country caused minor damage and injured 10 people. Despite improvements, industrial safety remains a major issue in China, with accidents often blamed on poor oversight and a lax approach to safety regulations.