GRAND RAPIDS, Mich. (AP/WXMI)- A college hockey referee who fell during pregame warmups in Grand Rapids, Michigan, has died.

The Western Collegiate Hockey Association and the National Collegial Hockey Conference issued a statement saying Oliver “Butch” Mousseau died Friday. Mousseau struck his head on the ice on March 18 at Van Andel Arena. He was to have worked a semifinal game between Michigan Tech and Ferris State.

Mousseau was not wearing a helmet and had to be taken off the ice on a stretcher. Mousseau also had officiating experience in the minors and Canadian juniors.

Sports blog SBNation.com has collected various sources confirming Mousseaux’s death.

Friday afternoon, the Boston College Hockey News tweeted that Mousseaux had passed away.

The college hockey community learned the news of @WCHA_MHockey referee Butch Mousseaux’s passing today. Great man of the game will be missed — BC Hockey (@BCHockeyNews) March 25, 2016

Other hockey sources, including the Michigan Tech Hockey team also tweeted of Mousseaux’s passing.

We're extremely saddened to hear about the passing of Butch Mousseaux. Please keep his family in your thoughts and prayers. #ButchStrong — Michigan Tech Hockey (@mtuhky) March 25, 2016

The Associated Press contributed to this story.