State Department officials upgraded 84 of Hillary Clinton's private emails to various levels of classification when they published 551 emails under a federal judge's orders on Saturday.

Most of the 84 emails were upgraded to "confidential," the lowest level of classification. A handful were upgraded to "secret." None were designated "top secret," though the State Department upgraded as many as 29 emails to "top secret" when they missed a court-ordered deadline at the end of January.

The intelligence community inspector general has argued many of the now-classified emails were considered classified when they passed through Clinton's private email network. Clinton maintains none were classified at the time.

The State Department announced in late January it had already opened its own inquiry into when the emails should have been considered classified.

Agency officials are slated to release thousands more of Clinton's emails in four different installments spread throughout the month of February. More emails could be upgraded to "top secret" before the Super Tuesday primary contests at the beginning of March.

The FBI is investigating Clinton's use of a personal server to transmit classified information.