Mining tragedies point to persistent problems in safety

Deadly explosion in Guizhou closely follows similar accident this week

At least 11 people were killed on Thursday in China's second deadly coal mine accident in two days.

The tragedies point to continuing safety issues in the industry despite a major decline in deaths among miners in recent years. Xinhua News Agency said 19 people were working at a mine in Guizhou province when an explosion ripped through the shaft early in the morning.