Owners of a 20-acre South Boston site that is being considered for a 60,000-seat Olympic stadium are reluctant to sell the property if Boston ends up hosting the 2024 Summer Games.

The New Boston Food Market, which is controlled by a cooperative of meat and seafood wholesalers that supply local restaurants, employs 700 workers whose livelihood would be threatened by plans to build a stadium at the Widett Circle property.

Jeffrey Corin, president of New Boston Food Market, told The Boston Globe that a sale of the property would require unanimous approval of the cooperative’s 18 shareholders.

The Boston 2024 committee that is lobbying to bring the games to Boston has not announced its choice for the stadium site or other venues that would be used during the games if Boston makes the final cut in 2017.

The food market site has attracted widespread interest from developers in recent years, Corin told the Globe, but has rebuffed the offers.

After vendors raised concerns, Boston 2024 Committee Chairman John Fish, the CEO of Suffolk Construction, met with the cooperative in October and promised to include them in the planning process as it goes forward, according to the Dorchester Reporter.

Boston is competing with Los Angeles, San Francisco and Washington, D.C. to be the U.S. Olympic Committee’s nominee to host the games, a decision expected early next year. The final decision will be made by the International Olympic Committee in 2017, which is also considering numerous sites in other countries.