The Dallas Mavericks ' majority owners filed a lawsuit Tuesday against the Dallas Stars, accusing the NHL team of blocking long-planned upgrades to the American Airlines Center and breaching their lease agreements. The legal action signals a deepening rift between the two franchises that share the downtown arena.

Dallas Sports Group (DSG), which owns the Mavericks and is led by billionaire Miriam Adelson and her son-in-law Patrick Dumont, said in the lawsuit that "the Stars are holding the American Airlines Center hostage." The ownership group claims the NHL team has blocked efforts to improve the 24-year-old arena and is seeking court confirmation of its lease rights, along with injunctive relief to move forward with planned renovations. DSG acquired a 69% majority stake in the Mav

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