South Africa’s Harmony Gold has brought all employees at its Kusasalethu mine to the surface and will restart production after an illegal sit-in of nearly 48 hours, the bullion miner said on Friday.

About 1,700 workers at the mine situated 70 km from Johannesburg brought production to a standstill on Wednesday, demanding payment of a special bonus, removal of the general manager and assurances that disciplinary action will not be pursued.

“A thorough independent investigation into the circumstances surrounding the illegal sit-in, which lasted nearly 48 hours, will be conducted,” Harmony Gold said in a statement. “Production at the mine will proceed over the weekend.”