Big 12 commissioner Bob Bowlsby accused ESPN of encouraging other conferences to pick apart the league so Texas and Oklahoma can move to the Southeastern Conference more quickly and without paying a massive buyout.

“I have absolute certainty that they (ESPN) have been involved in manipulating other conferences to go after our members,” Bowlsby told The Associated Press on Wednesday after sending a cease-and-desist letter to the network.

The letter addressed to ESPN executive Burke Magnus, president of programming and content, said the Big 12 had become aware the network had taken actions “to not only harm the Big 12 Conference but to result in financial benefits for ESPN.”

ESPN, which owns the SEC Network, signed a $3 billion deal with the SEC last year that will give the network the broadcast rights to all the conference’s football games starting in 2024.

In the letter, Bowlsby said that ESPN has “actively engaged in discussions with at least one other conference regarding that conference inducing additional Members of the Big 12 Conference to leave the Big 12 Conference.”

Bowlsby declined to name the conference in an interview with AP, but a person with knowledge of the situation said the commissioner was referring to the American Athletic Conference. The person spoke on condition of anonymity because the Big 12 didn’t authorize the release of that information.