Flyers winger Wayne Simmonds was the subject of racial slurs after getting in a fight during a game in the Czech Republic on Sunday, Yahoo! Sports reported.
Fans chanted "opice," which means monkey, according to reports.
The marketing director of Chomutov, which faced Simmonds' team, issued an apology.
"We are disgusted with the behavior of small groups of spectators who significantly damaged the reputation of the whole. . . . club. We would like to deeply apologize to Mr. Simmonds and the Liberec players," David Dinda said in a statement.