EVIDENCE of Russian meddling in the 2016 American election is beyond dispute, President Donald Trump’s national security adviser has told an international conference.

Referring to the indictment of 13 Russians announced on Friday, H R McMaster told the Munich security conference that “with the FBI indictment, the evidence is now incontrovertible” of Russia cyber-meddling.

He also scoffed at any move to work with Russia on cybersecurity, saying “we would love to have a cyber dialogue when Russia is sincere about curtailing its sophisticated form of espionage”.

The federal indictment brought by special counsel Robert Mueller represents the most detailed allegations of illegal Russian meddling during the campaign that sent Trump to the White House.

The 13 are charged with running a social media trolling campaign aimed in part at helping Trump defeat Hillary Clinton.

The indictment marks the first criminal charges against Russians believed to have secretly worked to influence the outcome.

The indictment says the organisation was funded by Yevgeny Prigozhin, a wealthy businessman with ties to President Vladimir Putin.