I would like to have an idiomatic way to say "good news" and "bad news" in Latin. For example, I would like to be able to say "I have some good news" or "The bad news is that you need an operation". I found boni nuntii in Cicero's Ad Atticum 3.XI.1, and context suggests it means what I want. (The same phrase appears also in the Second Book of Kings, but it is in singular genitive.) However, I have been unable to locate a similar expression for bad news.
Are there attested examples in classical literature of something that means "bad news" in a way similar to how boni nuntii means "good news"? I believe mali nuntii (which I didn't find) would be understood perfectly, but I wonder if I'm missing an idiom here.