Federal grand jury subpoenas have been issued for associates of former national security adviser Michael Flynn, CNN is reporting.

The news is breaking just after President Trump fired FBI Director James Comey.

According to CNN, the subpoenas were issued within the past several weeks by the U.S. Attorneys Office in the Eastern District of Virginia. Dana Boente oversees that office. He is also acting as head of the Justice Department’s National Security Division.

The subpoenas seek information about Flynn associates’ business dealings after he left his position as director of the Defense Intelligence Agency in 2014 and are part of a larger investigation into whether Trump associates colluded with the Russian government, according to CNN.