Donald Trump has attacked top officials he appointed at the justice department and FBI, accusing them of political bias in the investigation into Russian interference of the 2016 election.

On Friday morning the US president tweeted: "The top Leadership and Investigators of the FBI and the Justice Department have politicized the sacred investigative process".

Mr Trump is expected to approve the releases of a controversial memo that suggests the FBI abused its powers to spy on one of his aides.

The memo, commissioned by the Republican head of the House intelligence committee, Devin Nunes, is said to be critical of the FBI’s handling of part of the investigation into Russian election meddling.

It is said to focus on how the FBI handled information from Christopher Steele, the former British spy who compiled a dossier about alleged links between Donald Trump and Russia.

The memo reportedly says that the FBI failed to make clear Mr Steele was the source of information used to request a wiretap on Carter Page, a Trump campaign official, before the election.