This also would never happen at my daycare with a child I had in my care for so long. Regardless, I would remove the child from the play space to be alone until she could calm down. I would tell her that she was behaving badly and myself and her friends don't need to hear her doing it so she can be by herself until she's ready to behave nicely. She would stay there until she was calm, quiet and ready to apologize. Yes, at 2.5 years she should be able to do all this.
I also reinforce that it is okay to have whatever feelings she is having but not okay to scream, kick, hit and encourage her to use words to tell me how she is feeling. (after she has calmed down)