it's my local zoo. They are banned and at this time they're not 100% certain if that is what happened. Although they have found others at the scene with handwritten messages in.
I've got into arguments about these things and balloon releases on our local fb group, we're in the countryside and farmers are always complaining how dangerous they are. But we all get shouted down that we're the "fun police".
It's going to be interesting to see how this plays out. In the meantime I've been a bit tearful, I've been visiting that zoo since the early 80s and watched it grow into something quite special, small with few resources but special nonetheless (even though I'm not a big fan of zoos). We're hoping the surviving primates can be helped through the trauma.