The Census Bureau said it found “certain processing anomalies” during its analysis of data collected from 2020’s census, casting doubt on whether the bureau will meet its December deadline to submit the results to the president.

“During post-collection processing, certain processing anomalies have been discovered,” Census Bureau Director Steve Dillingham said in a statement. “I am directing the Census Bureau to utilize all resources available to resolve this as expeditiously as possible. As it has been all along, our goal remains an accurate and statistically sound Census.”