EAST LANSING, Mich. -

A prosecutor says no charges will be brought following an investigation into an assault on a Michigan State University student who claimed he was punched and had his jaw broken after revealing he's Jewish.

In an interview with Local 4, Zach Tennen said he was assaulted at a party Aug. 26 just off the university’s campus. Tennen said he was punched in the face after admitting he was Jewish.

"And they were making Nazi and Hitler symbols and they said they were part of the KKK," he said.

The 2011 Birmingham Groves High School graduate says he was knocked unconscious. When he woke up, he says, he found a staple in his mouth and took a cab to Sparrow Hospital.

Ingham County Prosecutor Stuart J. Dunnings III announced the decision Thursday. He says in a statement he believes there was no evidence of any ethnic, religious or racial bias involved.

READ: Tennen family letter