An audience member shouted a racial slur during a Detroit Symphony Orchestra concert last week, the orchestra said.
In a statement on Facebook, the orchestra said it was "deeply disappointed by an incident" Friday night.
"Racism and bigotry have no place in Orchestra Hall, and behavior like this is unacceptable," the statement read. "Live music is a profoundly human experience that taps into our emotions and provides us all with a sacred space for listening. We apologize that this space was violated."
The orchestra did not reveal what the audience member said during a performance of "A Charlie Brown Christmas: Cyrus Chestnut & Friends," according to NBC affiliate WDIV.
The orchestra is investigating and plans to permanently ban the person from attending its concerts.