Six workers at Glencore's Kamoto Copper Company (KCC) mine in Democratic Republic of Congo's Lualaba province have tested positive for the coronavirus, KCC said on Tuesday.
The copper and cobalt miner said none of the workers screened and tested presented symptoms of Covid-19, adding they are isolating at home under medical supervision.
A provincial surveillance team is tracing those who came into contact with the workers who tested positive.
The KCC statement did not comment on whether this affected production but a source with knowledge of the matter said it did not.
KCC said it has strengthened its health and sanitation controls over the past three months.
Glencore owns 75% of KCC through its Congo unit Katanga Mining, which in April cut its cobalt production target for this year to 26 000 t from 29 000 t.