The Reds claim there was one complaint about each set of supporters.
A club statement read: “The first announcement related to an isolated incident in the South Stand, reported by Barnsley FC supporters towards the end of the first half. Stewards were deployed to the specific area. No further reports were made however a comprehensive investigation is now underway. Any form of discrimination is wholly unacceptable and will not be tolerated at Oakwell. We will take the strongest possible action against any individual found to be behaving in such a manner. “The second announcement relates to a discriminatory chant sung by Cardiff City supporters, reported in the second half. Barnsley FC will work openly with Cardiff City on this matter.”