Exotic = such animals as Bengal tigers, lions and grizzly bears. Apparently the owner (of a zoo in Ohio) let them all loose, and then shot himself. Read more here.
Of course, the animal rights campaigners are now up in arms about the decision to "shoot to kill" these animals. It seems they tried to tranquilise some of them but it wasn't working very well.
Scary stuff. I wouldn't want to be lying in bed at night worrying that these kinds of animals were roaming free in my suburb.