EAST LANSING, MI — The Wharton Center for Performing Arts at Michigan State University removed a display of dolls portraying prominent black figures that were hanging from a tree-like rack.

The felt ornaments hung from the tree-shaped rack depicted figures such as former President Barack Obama, first lady Michelle Obama and Prince.

A black graduate student noticed the dolls and said that there were other trees holding dolls of historic black figures, as well as a few white leaders, AP reports.

University Spokeswoman Emily Gerkin Guerrant apologized in a statement saying that “people were hurt and offended” regardless of the intent of the display, the Associated Press reports.

School officials said that they will provide racial bias training for workers and volunteers.

Guerrant told The Associated Press in an email Tuesday that the display of historic dolls and ornaments was part of February’s Black History Month celebration. The Wharton Center is hosting several events, including “We Shall Overcome: A Celebration of Martin Luther King Jr.” on Feb. 14.