Initial reports suggested the collapse was caused by flooding at the mine in the municipality of Muzquiz, in the northern state of Coahuila.
The fatalities occurred after a makeshift gold mine collapsed near Bondo in Lower Uele province of the Democratic Republic of Congo, taking the death toll from mine accidents to 50 this year.
The accident happened Saturday in South Solok in West Sumatra province when a group of 12 people were digging for gold at an abandoned mine.
Defence Minister Mahamat Sala says more victims might still be buried in rubble after a mine in Tibesti region near Libyan border collapsed on Tuesday.
The jade hub of Hpakant, in Kachin State in the north of the north of the country, is frequently hit by deadly accidents, despite government pledges to clean up the lucrative mining industry.
Villagers had dug a 60-metre deep shaft in a river bed to search for gold in Kohistan district of Badakhshan province. They were inside when the walls fell in.
Dozens of workers are still missing after a collapse at a state-owned coal mine in the Godda district.
Efforts are underway to rescue 33 workers who are trapped underground in western region of Chongqing.
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