Texas governor Greg Abbott and lieutenant governor Dan Patrick have ordered an investigation of Texas Southern University, a historically Black institution in Houston, after a state audit found evidence of financial mismanagement and bookkeeping inconsistencies, The Texas Tribune reported. Patrick also said he would look into freezing state funding to the institution.

The audit found 700 invoices, totaling $280 million, linked to contracts that were listed as expired in the institution’s database. Another 800 invoices, worth $160 million, were dated before the purchases were approved, the Tribune reported. TSU was also months late in turning in financial statements for the past two fiscal years.

The auditor attributed the errors to staffing vacancies, poor asset oversight and weak contracting processes.

TSU officials said they had already fixed some of the issues outlined in the audit.

“Texas Southern University has cooperated with the state auditor in evaluating our processes,” officials said in a statement. “The University enacted corrective measures prior to the release of the interim report, including a new procurement system. We look forward to gaining clarity and continuing to work with the state auditor to ensure transparency for all taxpayers of Texas.”