Washington – Investigators probing President Donald Trump’s team for possible connections to Russia have asked the White House to hand over records for what is believed to be the first time, the New York Times said Friday.

Members of the sweeping federal investigation led by special counsel Robert Mueller requested the White House submit documents linked to Trump’s former national security adviser Michael Flynn, according to the paper, citing authorities close to the investigation.

The document request, while not a formal subpoena, was the latest signal that the probe is gathering pace.

The news came one day after reports revealed that Mueller — a former FBI director — has impaneled a grand jury to investigate Russia’s interference in the 2016 presidential election.

Flynn — who was ousted mere weeks after being named Trump’s national security adviser over mischaracterizing contacts with Russian officials — is at the center of the Russia controversy plaguing the White House.

© GETTY IMAGES NORTH AMERICA Drew Angerer Members of the sweeping federal investigation led by special counsel Robert Mueller requested the White House submit documents linked to Trump's former national security adviser Michael Flynn, according to the the New York Times

© GETTY IMAGES NORTH AMERICA Drew Angerer – Members of the sweeping federal investigation led by special counsel Robert Mueller requested the White House submit documents linked to Trump’s former national security adviser Michael Flynn, according to the the New York Times