At least 10 people were killed and another 17 injured in an explosion at a steel plant in northeastern China...three people were still missing after the accident...[The plant is] owned by state-run Angang Heavy Machinery...in Liaoning province, a spokesman for parent company Ansteel Group said. "We're still searching (for the people missing) and trying to find the cause,"...Workplace accidents are common in China, where bosses frequently ignore safety rules in the quest for higher profits. Nearly 50,000 people died in work-related accidents in the first nine months of 2011, down 16 percent from the the same period in 2010...