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.
Sudan's RSF agrees to US proposal for humanitarian ceasefire
Sudan's paramilitary Rapid Support Forces agreed to a proposal from the United States and Arab powers for a humanitarian ceasefire and is open to talks on a cessation of hostilities, it said on Thursday in a statement.
India top court says Air India crash report does not insinuate anything against pilot
India's top court said on Friday that a preliminary report on an Air India crash that killed 260 people in June does not insinuate anything against the captain, but it will hear a plea from the pilot's father on November 10 for an independent probe.
Flights delayed at Delhi airport after technical glitch
Aircraft movement at Delhi airport was hampered on Friday because its Air Traffic Control system suffered a technical problem, the Airports Authority of India (AAI) said after several flights were disrupted at one of the world's busiest airports.
Typhoon Kalmaegi hits Vietnam as death toll nears 200 in Philippines
Coastal areas in Vietnam were assessing the damage from Typhoon Kalmaegi's destructive winds and heavy rain on Friday, with one death reported by state media, following its deadly passage through the Philippines where it killed at least 188 people.
Trump says Kazakhstan to join Abraham Accords
US President Donald Trump said on Thursday that Kazakhstan will join the Abraham Accords to have normalized relations between Israel and Muslim-majority nations.
