A Foxwoods-backed casino proposal in Milford has signed a financing partner: Gaming and Leisure Properties Inc., a new company recently spun-off from the gambling firm Penn National Gaming, according to a person familiar with the deal.

Officials representing the Milford project had faced questions on Wednesday from the state gambling commission over a hole in the project’s financing plans. Foxwoods chief executive Scott Butera had promised the commission at the time that a deal would be completed within days.

The casino project goes before Milford voters on Tuesday for a life-or-death referendum.

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