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.
Several people detained in India's Gen Z-led protests against voter roll changes
Indian police detained several people in the capital New Delhi on Saturday, disrupting a second day of protests backed by the Gen Z-led Cockroach Janta Party and other opposition groups against changes to voter rolls.
Saudi Arabia says shrapnel from intercepted ballistic missile in Asir injures one
An Asian expat was injured after shrapnel from an intercepted ballistic missile fell in Ahad Rafidah governorate in the Asir region, Saudi Arabia's state news agency reported.
Israeli strike kills five in Gaza, health officials say
An Israeli airstrike killed at least five Palestinians in an apartment building in Gaza City early on Saturday, health and civil defence service officials said.
Nine injured in Australia as car crashes into crowd north of Sydney
A man appeared to lose control of a car that drove into a crowd in the Australian city of Newcastle on Saturday, injuring nine, authorities said.
India's 'cockroach' youth party to protest, demand poll chief's resignation
Prime Minister Narendra Modi faced renewed pressure on Friday as the Gen Z-led Cockroach Janta Party and a separate coalition of student and activist groups stage fresh protests, demanding the resignation of the elections commission chief over a controversial voter roll revision.
