The men are believed to have drowned after water from a burst dam flooded the shafts and underground tunnels they were working in.
Police said rescue teams were trying to pump out the water and search for bodies and any survivors.
According to reports, illegal miners in Battlefields, 175 km west of Harare, had entered shafts on land owned by RioZim and another firm in search of gold.
It added that the two mines, called Silver Moon Mine and Cricket Mine, are run by registered companies.
No evidence alleged Bondi gunmen received military training in Philippines
There is no evidence indicating that the two suspects involved in the Bondi Beach attack received any form of military training while in the Philippines, the country's National Security Adviser said on Wednesday.
At least 12 killed in Nigeria mining site attack
At least 12 people were killed and three others abducted when gunmen attacked a mining site in Atoso village in Nigeria's restive Plateau state, a local group leader said on Wednesday.
Russian attack on Ukraine's central Cherkasy injures six, causes blackouts
Russia launched a "massive" drone attack on Ukraine's central Cherkasy region, injuring six people and triggering a blackout in part of Cherkasy city, the local governor said on Thursday.
UN, aid groups warn Gaza operations at risk from Israel impediments
The United Nations and aid groups have warned on Wednesday that humanitarian operations in the Palestinian territories, particularly Gaza, were at risk of collapse if Israel does not lift impediments that include a "vague, arbitrary, and highly politicised" registration process.
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