Separation of powers, role of the ministry of Justice

I understand that the law differs from country to country but what is the general consensus on the separation of powers regarding this particular matter:

Recently, the ministry of justice (African country) spoke at the parliament of cases still under investigation and not yet tried by using words to would suppose he already knows the verdict. He says "heavy files" .. "sensitive and alarming cases", "you will see what the magistrates can do" etc. This would also suggest that he knows about the details of these cases.

As a member of the executive, is the ministry of justice allowed to speak of cases prior to court proceedings? Is he also allowed to inquire about said cases and get the details?

Thank you in advance for your opinions!

PS: I have no background in law