Impala Platinum Holdings Ltd. will resume production at its Rustenburg operations on Thursday, after the company suspended activity earlier in the week following an accident that killed 12 employees.

The deep-level shaft in which a cage hoisting miners to the surface suddenly plunged on Nov. 27 will remain closed “while internal investigations and inquiries” are completed, the Johannesburg-listed miner, known as Implats, said in a statement Thursday. Production at the rest of the nine shafts will restart Nov. 30 after a period for mourning and checking the other elevators at the complex, it said.