Chris Kluwe, the former Minnesota Vikings punter, said Tuesday he will sue the team because they are refusing to release the results of an investigation into claims that his support for same-sex marriage led to his firing.

But the Vikings say they never told him they wouldn't release the findings.

"(The) Vikings have never made or broken promises as Kluwe and his attorney Clayton Halunen have claimed," the Vikings said in a statement on their website Tuesday morning. "As we have consistently communicated throughout this process, the Vikings will have further comment when the investigation is entirely complete and the team has made determinations on next steps."

Team officials have said they took Kluwe's allegations seriously, which is why they hired former Minnesota Supreme Court Chief Justice Eric Magnuson and former U.S. Department of Justice attorney Chris Madel, both partners at Robins, Kaplan, Miller & Ciresi, to perform an independent review.

After six months, the investigative materials were reportedly turned over to the team.

"After the Vikings were given the investigative materials from Magnuson and Madel, in order to further maintain objectivity and integrity, the team engaged a nationally-prominent law firm -- Littler Mendelson P.C. -- to evaluate employment law matters and provide findings and recommendations to the Vikings," according to the team's Tuesday statement. "Those recommendations are to be provided to the team this week."

Kluwe and Halunen held a press conference Tuesday morning to announce the lawsuit and denounce the team for reneging on what they said was a promise to make the investigation public.

Halunen said he was contacted by Vikings' representatives on Monday and was told they do not intend to make the report available either to Kluwe or to the public.

"At this point we have no choice but to file a lawsuit against the Vikings," Halunen said.

His first request in the legal proceedings will be for the report, he said.

Kluwe has accused Vikings' special teams coordinator Mike Priefer of making homophobic remarks during a 2012 position meeting and other off-color religious comments after the punter became a public advocate for same-sex marriage. Kluwe has said he was cut by the team in May 2013 because of his public support for same-sex marriage.