Another fatal coal mining incident has taken the lives of six miners near Muzquiz in the Mexican state of Coahuila and critics are ramping up their call for stronger regulations, the Los Angeles Times reported. In late July, an explosion at another nearby mine killed seven workers. The national miners’ union claims that 200 miners have died in Coahuila since 2006. The mine’s owner, Altos Hornos de Mexico, claimed that modern safety features allowed them to evacuate 285 miners after the collapse.