(CNN) Simone Biles took offense to a banner seen in Ann Arbor during the University of Michigan's football game with rival Michigan State over the weekend.

"You can't touch us @LarryNassar," read the banner, which hung from a window Saturday at the Psi Upsilon fraternity.

unbelievable.....



this is the type of stuff that makes me sick to my stomach



I hope the school is taking the proper measurements in investigating this... https://t.co/PVphwgWsqJ — Simone Biles (@Simone_Biles) November 18, 2019

The gymnast became aware of the sign after seeing people condemn it on Twitter. She tweeted that it was "unbelievable" that someone would hang such a sign.

"This is the type of stuff that makes me sick to my stomach I hope the school is taking the proper measurements in investigating this," she said.

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