JACKSON, Miss. (AP) — Struggling biofuel firm KiOR says in a financial filing that it will run out of money by September and that bankruptcy could follow.

The company, which built a refinery in Columbus to turn wood chips into synthetic oil, owes Mississippi $69.4 million. The Mississippi Development Authority has agreed to delay payments until the end of October to give KiOR time to raise new money or sell the company. Investment bank Guggenheim Partners was hired by KiOR, based in Pasadena, Texas, to seek a buyer or new investors.