President Jacob Zuma
The shooting of the 34 miners led to comparisons with apartheid-era policing
South Africa's justice minister has demanded an explanation after 270 miners were charged with the murder of their colleagues who were shot by police.
The decision had "induced a sense of shock, panic and confusion" among South Africans, Jeff Radebe said.
State prosecutors charged the miners under the apartheid-era "common purpose" doctrine, reports the BBC.
The decision has already been condemned by constitutional lawyers.
In a statement, Radebe said that under the constitution, the justice minister "must exercise final responsibility over the prosecuting authority".
He said he had therefore asked the head of the National Prosecuting Authority (NPA) "to furnish me with a report explaining the rationale behind such a decision".
Police shot dead 34 miners two weeks ago during a strike at the Marikana mine, owned by Lonmin, the world's third largest platinum producer, sparking a national outcry.
Police said they opened fire after being threatened by a crowd of protesters who advanced towards them, armed with machetes.
The 270 miners, six of whom remain in hospital, were arrested during the protests.
They were charged on Thursday, with the prosecutors arguing they were part of the crowd whose actions provoked the police into opening fire.
Former African National Congress youth leader, Julius Malema condemned the decision as "madness".
"The policemen who killed those people are not in custody, not even one of them. This is madness," said Malema, who was expelled from the African National Congress (ANC) earlier this year following a series of disagreements with President Jacob Zuma.