There's a term that's useful here: active listening. If they are fearful for their job, express concern and ask them to tell the story: "Oh no, that's terrible

There's a term that's useful here: active listening. If they are fearful for their job, express concern and ask them to tell the story: "Oh no, that's terrible! Why are you fearful, are you all right?" and you remain active by asking follow-up questions. For example to plug gaps in the story: "Wow! Did your manager say that to your face? Or was it hearsay through that one co-worker?" and so on. Expressing emotions is also perfectly fine: "I feel bad. Wish I could do something for you." I'd only interject long enough to get them talking again. If they need your help they'll have asked it by now :)