DALLAS (AP) — The FBI on Tuesday said it discovered 2,400 new records related to the assassination of former President John F. Kennedy as federal agencies work to comply with President Donald Trump’s executive order last month to release thousands of files.

The FBI said it’s working to transfer the records to the National Archives and Records Administration to be included in the declassification process.

The federal government in the early 1990s mandated that all documents related to the Nov. 22, 1963, assassination be housed in a single collection at the National Archives. And while the vast majority of the collection — which includes over 5 million pages of records — has been made public, researchers estimate that 3,000 files haven’t been released, either in whole or in part.

The FBI did not say in its statement what kind of information the newly discovered files contain. The FBI in 2020 opened a Central Records Complex and began a yearslong effort to ship, electronically inventory and store closed case files from field offices across the country. The agency said a more comprehensive records inventory along with technological advances allowed it to quickly search and locate records.