The Department of Justice asked the Equal Employment Opportunity Commission on Thursday to investigate MLB over its alleged discrimination against three Christian baseball players who inscribed Bible verses on their Pride Night hats during a game last week.

In a letter to MLB Commissioner Rob Manfred, Assistant Attorney General for Civil Rights Harmeet Dhillon said she referred the matter to the EEOC for “further investigation.” In a social media post accompanying the letter, she indicated the EEOC planned to investigate MLB.