A new batch of records from Hillary Clinton's tenure as secretary of state indicates the Democratic front-runner may not have handed over all of her work-related emails, as she has repeatedly claimed.

The emails, which were obtained by the conservative group Judicial Watch through a Freedom of Information Act lawsuit, contain conversations that were not included in the trove of roughly 55,000 pages of documents that Clinton's legal team surrendered in late 2014.

Clinton has previously stated under oath that she turned over every work-related record that resided on her private server.

But some of the messages, which stem from former deputy chief of staff Huma Abedin's multiple "clintonemail.com" accounts, were never released by the State Department through a series of montly document dumps that stretched from June 2015 to February of this year.

One of those emails refers to Clinton's "friends at Planned Parenthood," a group supporting her presidential campaign.

Another mentions a "confidential" background brief that was sent to Clinton's unsecured server that has since been redacted due to its classified nature. Clinton has long argued the classified intelligence that ended up on her server was never marked as such and that she was unaware any should have been characterized as "confidential."

Judicial Watch released the documents exactly one year after a federal judge ordered the State Department to provide them.

"These emails further undermine Hillary Clinton's statement, under penalty of perjury, suggesting she turned over all of her government emails to the State Department," said the group's president, Tom Fitton. "How many more Hillary Clinton emails is the Obama State Department hiding?"

The emails were made public one day after a federal judge paved the way for Judicial Watch to depose some of Clinton's closest aides, including Abedin.