Ghana has begun a probe into the deaths of six mine workers killed after a roof collapsed on them injuring two others at an American-run gold mine.

"We will find out if it is the fault of the sub-contractor, workers or the main company, all these will be established," John Peter Amewu, Ghana's minister of Lands and Natural Resources told local media in a broadcast Sunday.

Operations have been suspended following the accident which occurred at the Ahafo Mills Expansion project located about 400 kilometers from Accra, Ghana's capital, US-based Newmont mining said in a statement.