NORMAN, Okla. (AP) — A national spokesman for the Sigma Alpha Epsilon fraternity says two investigations are underway into allegations of racism and members’ knowledge of a racist chant at university chapters in Texas and Louisiana.

Spokesman Brandon Weghorst confirmed Thursday investigations into chapters at the University of Texas-Austin and Louisiana Tech University in Ruston.

Weghorst says none of the allegations have been substantiated, and the UT chapter is being “fully cooperative.” He says the Louisiana Tech probe is still in its early stages.

Late Wednesday, the board of trustees and alumni of the University of Oklahoma’s SAE chapter acknowledged in a statement the chant surfaced at the chapter “three to four years ago.” OU President David Boren said the university is investigating fraternity members to determine their “level of responsibility.”