President Donald Trump's fired national security adviser reportedly wants immunity to testify at hearings into alleged Russian election meddling.

Michael Flynn's lawyer says his client "has a story to tell", but needs to guard against "unfair prosecution".

The Senate opened its hearing earlier, with one member warning of Kremlin "propaganda on steroids". Mr Flynn was sacked in February after misleading the White House about his conversations with a Russian envoy.

His links to Russia are being scrutinised by the FBI and the House and Senate Intelligence Committees.

"General Flynn certainly has a story to tell, and he very much wants to tell it, should the circumstances permit," said his attorney, Robert Kelner.

He said he would not comment on his discussions with congressional panels investigating claims Moscow sought to help Donald Trump win the US presidential election.

The lawyer said the media was awash with "unfounded allegations, outrageous claims of treason, and vicious innuendo".