The Vikings on Friday suspended special teams coordinator Mike Priefer for three games following a six-month investigation into accusations made by former punter Chris Kluwe that Priefer made anti-gay remarks in a team setting during the 2012 season.

Priefer, who denied the remarks earlier this year, apologized Friday in a statement. He must also attend sensitivity training, and if he does, his suspension could be reduced to two games.

“I owe an apology to many people: the Wilf family, the Minnesota Vikings organization and fans, my family, the LGBT community, Chris Kluwe and anyone else that I offended with my insensitive remark,” Priefer said in the statement. “I regret what has occurred and what I said. I am extremely sorry but I will learn from this situation and will work on educating others to create more tolerance and respect.”

In a 29-page document summarizing the findings of the Vikings’ independent investigation — which was led by former U.S. Department of Justice attorney Chris Madel and former Minnesota Supreme Court Chief Justice Eric Magnuson — the national law firm Littler Mendelson, hired by the Vikings to assess the report, concluded that Priefer made an anti-gay comment to players, although there was no record of his having made any other such comments.

The showdown between Kluwe and the Vikings does not appear to be over, however. Kluwe told the Star Tribune on Friday that because the Vikings did not release the investigation’s full report, he plans to sue the Vikings next week, claiming discrimination on the grounds of human rights, religion, defamation and “tortious interference for contractual relations.” He echoed that sentiment on Twitter as well, writing that “next week is open season.”

The investigation also provided details on Kluwe himself being insensitive in team settings. The report notes Kluwe making light of the Penn State football sex-abuse scandal, which Kluwe confirmed Friday on Twitter. He tweeted that he and “over half the team” made Penn State “rape” jokes in front of coaches, for a month or more.