NEW : Underground fire has been subdued , but conditions remain challenging , he says . Eight other miners killed earlier are unharmed . Rescue operations continue at Doornkop mine , west of Johannesburg . `` Obviously , this is all subject to inquiry . The fire is believed to have broken out more than a kilometre underground .
NEW : Underground fire has been subdued , but conditions remain challenging , he says . Eight other miners killed earlier are unharmed . Rescue operations continue at Doornkop mine , west of Johannesburg . The fire is believed to have broken out more than a kilometre underground .