Both police departments responded to an online posting of a mass shooting at area high schools on Friday.
"It was something along the lines since it's the end of the world, why not shoot up the schools or do something in the schools, it doesn't matter," said Oak Creek Police Chief John Edwards.
Edwards says the message originated on the internet and is being spread by worried students all over Wisconsin.
"When the kids see it, they talk to parents, rumors even start like wild fire. We've investigated everything that we've been told that we're asked to look at, and we can find no credible threat what so ever," said Edwards.
The message is likely the same post seen by students at Waukesha North High School. That school stepped up its police presence starting on Tuesday. Oak Creek is following suit with a warning to any students who may be posting threats.
"In lieu of what's happened in Connecticut, especially in our own city if you tell us it was a joke, that's too bad, you're going to find out we're not taking it as a joke and we're going to practice zero tolerance on it," said Edwards.
Oak Creek residents who have dealt with their own mass shooting this year say the increased police presence at the high school is noticeable.
Police say they will have a tough time tracking down from where the original post came since so many students shared it on Facebook and Twitter. It may not have even started in Wisconsin.