New York (CNN Business) Sears stock plunged on Thursday after reports that the retailer isn't paying companies for their products.

Three companies that sell items at Sears told Reuters that Sears had missed payments to them over the past few weeks. Sears stock fell another 30% Thursday. Sears did not respond to multiple requests for comment.

A bankruptcy could come very soon . Sears Holdings, the parent company of Sears and Kmart, faces a Monday deadline to pay $134 million in debt.

The most recent filing from Sears showed it had only $193 million of cash on hand as of August 4, the end of its last fiscal quarter. It also has $269 million available to it from lenders, according to figures it released on September 13.

Having so little cash available would make it very difficult for Sears to pay back $134 million in debt due on Monday, said Robert Schulz, chief credit analyst for the retail industry for Standard & Poor's. A company the size of Sears needs to have cash available to pay major vendors and stock up its inventory for the holiday season. It also uses cash to pay employees and other costs. Basic administrative expenses, including payroll, came to about $300 million a month for Sears.

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