Two board members of Epic Games have resigned amid Justice Department concerns over antitrust concerns.

The DOJ said that the two board members, who were not identified, raised issues that their positions on the Epic and Tencent boards violated Section 8 of the Clayton Act. Tencent owns a minority interest in Epic and is the parent company to its rival, Riot Games.

Tencent also has agreed to amend its shareholder agreement with Epic to relinquish its unilateral right to appoint directors to the board.

Epic, which is based in North Carolina, operates Fortnite, one of the largest games in the world.

Spokespersons for Epic and Tencent did not immediately return a request for comment.

The Walt Disney Co. announced a $1.5 billion equity stake in Epic earlier this year as part of plans to collaborate on new games and entertainment universe.

Section 9 of the Clayton Act prohibits directors and officers from serving simultaneously on the boards of competitors.