Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE mocked former FBI Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE on Thursday after a report by the Justice Department's internal watchdog revealed that he had used a private email account to conduct official business on multiple occasions.

"But my emails," Clinton tweeted in response to a reporter highlighting that portion of the inspector general report saying Comey used a private Gmail account during his tenure as the nation's top cop.

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Clinton's use of a private email server during her tenure as secretary of State became the subject of a lengthy FBI investigation under Comey and led to fierce scrutiny by Republicans, who accused the 2016 Democratic presidential nominee of mishandling classified information.

Comey eventually recommended against criminal charges for the former secretary of State, but called Clinton's use of a private email server to conduct official business “extremely careless.”

Her tweet came after Justice Department Inspector General Michael Horowitz issued a highly anticipated report on Thursday about the FBI and DOJ’s actions regarding the Clinton email investigation in the months before the 2016 presidential election.

That report faulted Comey with “insubordinate” behavior during the investigation, but ultimately concluded that political bias at the FBI and Justice Department did not influence law enforcement officials’ decision not to prosecute Clinton.

--Updated 6:02 p.m.