A subpoena has been issued demanding documents from Donald Trump's former national security adviser relating to Russia's alleged interference in the US election.

Michael Flynn was subpoenaed by the Senate Intelligence Committee as part of its investigation into links between Russia and Mr Trump's campaign team.

The committee's chairman Richard Burr and vice chairman Mark Warner said they had first asked for the documents on 28 April but Flynn's lawyer had not produced them.

Senator Warner told Reuters that some documents had been received from people but, as other people were not complying, the "next steps" were going to be taken.

Flynn was fired by President Trump in February after less than a month in the job.


The White House said he had misled top officials, including Vice President Mike Pence, regarding his links with Russia's ambassador in Washington.

Image: Ms Yates told senators her department believed General Flynn was compromised

On Monday, former acting US Attorney General Sally Yates told a hearing that she had warned the White House about Flynn's possible vulnerability to blackmail from the Russians and that he could be compromised.

Both Russia and Mr Trump's administration deny any collusion aimed at influencing November's election result.

The retired Army lieutenant general is also being investigated by other congressional committees and by the Pentagon's inspector general regarding his contacts and earnings from organisations linked to the Russian and Turkish governments.