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The workers are believed to have collapsed after the gas built up in poorly ventilated tunnels.
The media regulator said the ban would be in place "until further notice".
He made the comment on an official visit to Ethiopia, saying it could prove dangerous for a volatile region.
"This is the only hustle we know," miners tell the BBC as they try their luck at the site in Springs.
It is the latest twist over the fate of Lungu's body, which remains in a South African morgue since his death.
The troops, who landed at an airfield in Bauchi state, will not take part in combat operations, officials say.
Officials allege that an empty coffin was placed over concealed bags of charcoal in a hearse.
John Steenhuisen will not seek re-election as DA leader, leaving the race wide open for a successor.
Bouquets of cash have been blooming in popularity in Kenya but recent warnings may slow the trend.
The US president has shaken up international relations and the continent is working out where it stands.
The political rift that could spiral into conflict again after the vice-president was accused of treason.
Yameogo Aminata says her four sons were slaughtered and her daughter is missing.
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