Government watchdog group Judicial Watch confirmed Thursday that while being criminally investigated by the FBI, federal agents used a Grand Jury to target former Secretary of State Hillary Clinton during the 2016 presidential election.

According to documents obtained through a lawsuit against current Secretary of State Rex Tillerson, which was filed to preserve evidence surrounding Clinton's email scandal, Grand Jury subpoenas were submitted as part of the probe surrounding Clinton's use of unsecured, private email accounts on multiple Blackberry devices.

"In the filing FBI Special Agent E.W. Priestap declares under penalty of perjury that the FBI 'obtained Grand Jury subpoenas related to the Blackberry e-mail accounts, which produced no responsive materials, as the requested data was outside the retention time utilized by those providers,'" Judicial Watch found.

The lawsuit filed by the organization was originally against former Secretary of State John Kerry, whose staff regularly refused to respond to document requests surrounding Clinton's time at the State Department. Many of them are still working in the Department under the Trump administration.

“The FBI convened a grand jury to investigate Hillary Clinton in 2016. Why is this information being released only now?” Judicial Watch President Tom Fitton said about the finding. “And it is disturbing that the State Department, Justice Department and FBI are still trying to protect Hillary Clinton. President Trump needs to clean house at all these agencies.”