Gymnast MyKayla Skinner claims Simone Biles mistreated her amid a growing feud over Riley Gaines and transgender athletes in sports.

Olympian and former University of Utah athlete MyKayla Skinner has weighed in on the social-media spat between Simone Biles and Riley Gaines, saying that she was “belittled” and “ostracized” by Biles, her former teammate. She did not offer specifics.

Mykayla Skinner has reignited her feud with Simone Biles. In a statement delivered by right wing outlet One America News Network, Skinner accused Biles of bullying while expressing support for Riley Gaines.