Santa Clara mayor Lisa Gillmor told NBC Bay Area that if the 49ers do not agree to turn over financial documents disclosing how they spent taxpayer money, the city may be forced to take over stadium operations.

"If they don't cure the breach, we are going to take steps to take back management of the stadium," Gillmor told NBC Bay Area.

An audit presented to the Santa Clara City Council on Thursday showed that the 49ers organization has not shared budget documents with the city — something that is required by the stadium contract. An independent auditor told NBC that taxpayer funds may have been used to "reseed the field several times."

On Sunday, the 49ers fired back in a statement of their own:

"The Mayor's accusations that money is going from the City's General Fund into the stadium are false and irresponsible. As the Mayor surely knows, since she voted for the agreements, the stadium does not use general fund money. In fact, funds are flowing into the General Fund from the stadium. The 49ers Stadium Management Company has generated over $5.5 million for the City's General Fund over the last two years, plus an additional $2 million in fees to the City. On top of that, another $2 million has also gone to the Discretionary Fund.

"The successful management of Levi's Stadium by the 49ers Stadium Management Company has allowed the Santa Clara Stadium Authority to reduce its outstanding debt by over $200 million since opening, and fund over $16 million in cash reserves. Those figures do not even include the significant increase in sales and hotel tax revenues generated by the stadium, hotels and other local businesses that will contribute to the Santa Clara General Fund on an annual basis as a direct result of the ongoing operation of Levi's Stadium."