Democratic presidential candidate Hillary Clinton has been under fire for using a private, unsecured email server during her stint as secretary of state, and on Thursday the US State Department released another 3,105 of her emails from the server.<br />No fewer than 275 of the newly released emails have been upgraded to "classified," bringing the total number of classified documents in Clinton's private email server up to a full 1,274 so far.<br />A State Department official told Fox News that two of the newest emails were upgraded to "secret," with most of the rest being determined to be "confidential."<br />In response to Thursday's release of new classified emails, Republican National Committee (RNC) chairman Reince Priebus issued a statement strongly condemning the Democratic candidate.<br />"With more than 1,250 emails containing classified information now uncovered, Hillary Clinton's decision to put secrecy over national security by exclusively operating off of a secret email server looks even more reckless," said Priebus.