South African authorities have come under intense scrutiny for their response after civic groups said hundreds of miners have been trapped deep in an abandoned gold mine for months.

The South African government has launched a rescue operation at an abandoned gold mine in the country’s North West province, where at least 109 men have died, a group representing the miners said, after local authorities cut off vital supplies in a dramatic bid to crack down on the country’s illegal mining trade.

One hundred and eighteen illegal miners have been extracted from the Stilfontein mine in South Africa on Monday and Tuesday as part of a rescue operation, of which 36 were certified as dead, police said in a statement on Tuesday.