Suspicions were aroused at a high school girls’ hockey game in Fargo, North Dakota, on Friday when the specialized resurfacing machine known as a Zamboni appeared to weave across the ice between first and second period. Spectators reported the driver exhibiting “erratic behavior,” and police arrived at the sports arena by 8:15 p.m., responding to a call by a school district employee.

Steven Anderson, the driver of the Zamboni, was arrested under the suspicion of a DUI shortly before the end of the second period. No players were on the ice while Anderson was driving, according to Jim Larson, the director of finance and human resources for Fargo Parks. The Fargo Park District runs the rink where members of the Davies High School and Williston High School girls’ hockey teams were competing. No injuries or damages were reported.

Anderson had worked for the Fargo Park District seasonally for about six years, but was fired immediately following the incident. “There is just a zero tolerance at the Fargo Parks district for something like this and this is unprecedented,” said Clay Whittlesey, Fargo Parks Recreation Director. “I’ve been in this position for 25 years. I’ve never heard of this before.”

Anderson has been released on bail, but he could still face up to 30 days in prison as well as a fine of up to $1,000, according to Fargo police.

“Safety is critical. We consider this to be a very serious incident,” stressed Larson. “On Monday we will take a full review to see how this happened and what we can do to keep it from ever occurring again.” The district already performs annual background checks on their employees.

The hockey game continued on rough ice after Anderson was taken away, and parents were relieved that there had been no injuries.