MEXICO CITY, Aug 6 (Reuters) - Saturday will be a crucial day in Mexico's effort to rescue 10 miners trapped in a coal mine, Mexican President Andres Manuel Lopez Obrador said.
The miners became trapped on Wednesday at a mine in the northern border state of Coahuila when their excavation work caused a tunnel wall to collapse, triggering flooding in three wells.
"Today is decisive, because, according to the technicians, we will know if there's a chance for divers to enter without risk," Lopez Obrador wrote on Twitter.
Six divers from Mexican . . .
