CHICAGO (AP) — A freak accident has left a well-known Chicago-area band conductor and music instructor hospitalized.

Ralph Wilder suffered several broken bones in his back after a projection screen housing fell from a ceiling at Northeastern Illinois University.

READ MORE: Chicago Culture Celebrates The City While Giving Back To Youth For Black History Month

It wasn’t immediately clear who Wilder was rehearsing with at time of the accident on Sunday. He is conductor of the Northwest Concert Band. He also is principal clarinetist with the Evanston Symphony Orchestra, plays with the Maxwell Street Klezmer Band. Wilder also teaches at North Park University in Chicago.

READ MORE: Mother And 10-Year-Old Daughter Dead, 4 Family Members Hospitalized After House Fire In Auburn Gresham

In a statement, Wilder’s son, Jeff, said his father suffered a severe spinal cord injury that may be permanent. He said surgery has been performed on Wilder’s spine and to remove bone fragments.

Northeastern Illinois spokesman Mike Hines says the university is investigating the accident that occurred in the recital hall.

MORE NEWS: Chicago Weather: Warm But Wet Sunday Morning Ahead Of Cold Front

(© Copyright 2018 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)