About 400 unionized workers at the Hollywood Casino Toledo are threatening to strike on Thursday at midnight if they can’t get a new labor agreement with the casino.

They have been working under a contract extension since Dec. 1, said Tony Totty, president of United Auto Workers Local 14 in Toledo who is supporting the hourly casino workers.

The UAW represents about 200 of the workers, including dealers, slot machine attendants, and others, while the United Steelworkers represents the other 200 hourly casino workers.

The parties were bargaining as of late Tuesday afternoon, said Eric Sweeney, staff representative for International Steelworkers Local 1-346, and talks were moving “very, very, very slow.”