Four miners have been killed in an explosion that caved in part of a coal mine in the northern Mexico border state of Coahuila.
The Minerales de Monclova company says Friday’s accident at its La Esmeralda mine was caused by methane gas, which apparently exploded. It says 132 other workers escaped unharmed and the bodies of the dead miners have been recovered.
Fourteen miners died in a May 3 blast at another coal mine in Coahuila, and 65 miners died in an explosion at another Coahuila coal mine in 2006. Safety violations have been cited in the May blast.
Minerales de Monclova says the mine involved in Friday’s accident has the latest safety technology.
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