Casino operator MGM Resorts International says it has broken off talks with rival Wynn Resorts regarding a possible deal for Wynn’s Boston-area casino project.

Late Tuesday, MGM announced that it was no longer pursuing talks with Wynn over a possible sale of the latter’s $2.6b Encore Boston Harbor casino, which is scheduled to open to the public on June 23.

MGM said it had “noted the anxiety raised by various stakeholders” after news of the potential blockbuster deal emerged late last week. As a result, MGM said it had concluded that “the best course of action is to discontinue discussions concerning this opportunity.”

Last week’s announcement was greeted with bewilderment by gaming analysts, who questioned by Wynn would be willing to walk away from its largest US project outside Nevada so close to the finish line.