That's a tricky one! The good thing is, though, that is should be pretty easy to confirm or deny since your DD said that the teacher put those boys in timeout. You could just ask the teacher if that was, in fact, the case and then if so talk to her about the daily hitting. I'm really hoping for your DD's sake that it was, in fact, a story!
DD's also going through a phase where she makes up things ALL THE TIME. It's so hard to know if she's playing or not (well, unless she does her pretend cry, then it's obvious). She keeps making up pain and saying that she's hurt when she's clearly not. Normally she just wants some hugs/attention but it does make it tricky because I don't know if it's a drop everything emergency or not. The other thing that she's been doing is getting "stuck" lately (her favorite is sliding her body between the arm rest on our computer chair because her head won't fit through anymore. Then I hear a loud yell "Stuck mommy!!". Sometimes she really is... sometimes not.