Democratic presidential candidate Hillary Clinton says the FBI has not contacted her regarding its probe of whether she held classified information on her private email server.

Asked on CNN's "State of the Union" whether she had been interviewed by the FBI yet, the former secretary of state replied, "No."

She did not elaborate.

Federal investigators are looking into the security of Clinton's email setup amid concerns from the intelligence community's inspector general that classified information may have passed through the system. Clinton provided the server to the FBI in August.

Clinton has said she didn't send or receive information that was classified at the time via her personal email account.