The White House has released declassified FBI memos revealing that the bureau secretly opened a counterintelligence investigation in 2017 into whether President Donald Trump's dismissal of FBI Director James Comey was linked to Russia. The probe, reportedly codenamed "Oxferd Comma" (an apparent misspelling of "Oxford"), examined whether Trump's own actions raised national security concerns about him potentially being influenced by, or acting on behalf of, Russian interests. Its disclosure reopens scrutiny of the Trump-Russia affair years after the original Mueller investigation concluded.

The investigation began shortly after Trump fired Comey in May 2017, a move that at the time triggered widespread speculation about a possible connection to the FBI's broader Russia inquiry. The White House's release of the memos comes as President Trump has continued to publicly criticise Comey, recently branding him a "dirty cop" and a "crooked man" following Comey's indictment. Further specifics on the scope, findings and conclusion of the probe were not detailed in the available material.