The Big 12 Conference released a public reprimand and a $25,000 fine toward Iowa State University on Tuesday after fans rushed onto the field after Saturday’s home game.

“We have a duty to provide a safe game environment,” said Big 12 Conference Commissioner Bob Bowlsby in a release. “The Iowa State Department of Athletics has a written event-management policy that was not thoroughly implemented, and was unsuccessful in ensuring the safety and security of all visiting team game participants.

Although the Big 12 Conference does not currently have a policy prohibiting spectators from entering playing areas for post-game celebrations, it is of utmost importance that home-game management provide adequate security measures for our student-athletes, coaches, game officials and spectators.”

Iowa State University President Wendy Wintersteen announced Iowa State’s decision to appeal the fine on Tuesday.

“Our institution takes the safety and welfare of all student-athletes, officials and fans very seriously. We have reviewed all of our procedures, including several videos of the post-game celebration, and we do not agree with Commissioner Bowlsby’s assessment of the events that evening,” Wintersteen said in a release. “Chief [Michael] Newton, of the Iowa State University Police Department, and the CSC staff had a very thorough and specific plan.

Those plans were discussed and implemented prior to the game and were evaluated and adjusted during the game to ensure the safest atmosphere for every one attending the game, including the West Virginia players and staff.”

Fans failed to contain their enthusiasm after Iowa State upset then-No. 6 West Virginia on Saturday, 30-14.

The student section rearranged, congregating as closely as they could to the field while remaining in the stands. After the final play, fans rushed onto the field to celebrate with one another and the players.

It’s not the first time fans have stormed the field. After Iowa State’s win over then-No. 4 Texas Christian University in 2017, fans rushed Jack Trice Stadium. Athletic Director Jamie Pollard noted this in a response to the fine and reprimand.

“Our local law enforcement officers and the CSC security staff did an outstanding job keeping all the student-athletes, game officials and fans safe during the postgame celebration on Saturday,” Pollard said in a release. “I have personally watched the video multiple times and I am confident the officers and security staff followed the procedures we had previously submitted to the Big 12 Conference office. It is also important to note the protocol and practice used Saturday night by our law enforcement officers was nearly identical to the protocols used last year during the field rush following our win over TCU.

The Conference had no issue with ISU’s protocol or practice at that time and the results were the same as Saturday night. The visiting team was safely escorted from the field in less than 90 seconds in both situations.”