Legendary U.S. gymnast Simone Biles has apologized for making personal comments toward former NCAA swimmer Riley Gaines as they publicly disagreed about transgender women in sports.

Simone Biles clarified her comments on Tuesday after a heated social media interaction with conservative activist and former NCAA swimmer Riley Gaines over the weekend over her views on transgender athletes.

What began as a comment about a high school softball team erupted into a national fight over gender, fairness and who gets to speak for women.