More than 6,000 mailed ballots in Florida went uncounted in November's midterm elections.

Officials at the Florida Department of State informed a federal judge last week that 6,670 ballots that were mailed in ahead of the Nov. 6 midterm elections were left uncounted because they arrived after Election Day.

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Ballots mailed inside the U.S. must reach election offices by 7 p.m. on Election Day under current Florida law. It is not yet clear why the ballots did not make it to the election offices on time.

The missing ballots came from 65 of Florida's 67 counties.

The news comes after three races in the state — the Florida Senate race between Sen. Bill Nelson Clarence (Bill) William NelsonDemocrats sound alarm on possible election chaos Trump, facing trouble in Florida, goes all in NASA names DC headquarters after agency's first Black female engineer Mary W. Jackson MORE (D) and Gov. Rick Scott (R), the race for agriculture commissioner and the gubernatorial race — all went to recounts.

Updated Tuesday at 9:26 a.m.