DALLAS — A company partly owned by Tony Romo sued the NFL on Tuesday over a canceled fantasy football event in Las Vegas that was to involve the Dallas quarterback and other star players.

The Fan Expo LLC alleged in a lawsuit filed in Dallas County that the league intimidated players with threats of fines and suspensions if they attended what the NFL said was a gambling-related event because it was to be held at a facility associated with a casino.

The Texas-based company claims the NFL initially approved the event, set for mid-July, by allowing some members of league-owned media outlets to participate. Then in June, according to the lawsuit, players and in some cases family members of players were told they could be disciplined if they showed up.

“This case is about the NFL’s blatant and premeditated sabotage of an event designed to bring together the very people who are the backbone of the NFL — the players and the fans,” said the lawsuit, which seeks more than $1 million in damages.

NFL spokesman Brian McCarthy said the league was reviewing the lawsuit and would “respond accordingly.”

The Fan Expo created the National Fantasy Football Convention and used Romo as its headliner while getting commitments from Cowboys receiver Dez Bryant, New England tight end Rob Gronkowski and Pittsburgh running back Le’Veon Bell.

DeMarco Murray, Romo’s former teammate and the NFL rushing leader who signed with Philadelphia in free agency, also was among the 60 players the lawsuit says had agreed to attend.