The chairman of a House oversight committee says the FBI will not be turning over memos and other materials that detail discussions between former FBI Director James Comey and President Donald Trump. Flynn, who was sacked as national security adviser in February after he misled administration officials about his conversations with the Russian ambassador to the USA, earlier this week rejected a Senate Intelligence Committee subpoena for records of his communications with Russian officials, asserting his Fifth Amendment right against self-incrimination.

Congress, simultaneously with different federal agencies, is conducting several investigations to determine possible coordination between Trump’s campaign and the Kremlin to interfere in the presidential election to hurt the chances of Democratic hopeful Hillary Clinton.

But the FBI responded on Thursday, a day after Chaffetz’s 24-hour deadline, and said the bureau can not provide the memos until it consults with Robert Mueller, the special counsel now overseeing the investigation into alleged collusion between the Trump campaign and Russian Federation. The letter says that the House committee’s investigation will compliment the Special Counsel’s investigation without interfering with it. Chaffetz wrote that the House investigation would illuminate information that is exceedingly important to the public.

In its request to the Justice Department, committee leaders requested not only Comey’s notes of his interactions with Trump – but any others he may have documented of his communications with President Obama. But the bureau told him Thursday it could not yet turn them over because of Mueller’s probe.

He added, in a thinly veiled threat, “I trust and hope you understand this and make the right decision – to produce these documents to the committee immediately and on a voluntary basis”. He canceled a hearing scheduled Wednesday after Comey declined to testify.

“We are still awaiting official responses from both the Justice Department and White House, ” the Senate Judiciary Committee said in a statement late Wednesday. Gowdy led a special House panel that spent more than two years investigating the deadly 2012 attacks at a US diplomatic compound in Benghazi, Libya.