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.
Trump says no Israeli troops will go to Beirut after call with Netanyahu
US President Donald Trump said on Monday that Israel would not send troops to Beirut after a call he held with Israeli Prime Minister Benjamin Netanyahu.
Iran halting indirect talks with US over Israel's Lebanon incursion
Iran is halting indirect negotiations with the US after Israel ordered troops to push deeper into Lebanon to battle Tehran-backed Hezbollah, the Iranian news agency Tasnim said on Monday, complicating diplomatic efforts to end three months of war.
Trump says Iran really wants to make a deal with the US
President Donald Trump on Monday said that Iran really wanted to make a deal with the US and that it would be a good one for Washington and its allies.
Israel's Netanyahu orders attacks in Beirut's southern suburbs
Israeli Prime Minister Benjamin Netanyahu ordered attacks on the Hezbollah-controlled southern suburbs of Beirut on Monday, signalling further escalation of a war that has complicated mediation towards resolving the US-Iran conflict.
Malaysia bars under-16s from signing up for social media
Malaysia has begun barring those aged under 16 from registering accounts on social media platforms, its communications regulator said on Monday, as it boosts efforts to protect minors from exposure to harmful content online.
