Russian President Vladimir Putin likely directed efforts to try to swing the 2020 US presidential election to Donald Trump, according to an American intelligence report released on Tuesday that sources said would likely trigger US sanctions on Moscow.

The 15-page report, released by the Office of the Director of National Intelligence, added heft to longstanding allegations that some of Trump's top lieutenants were playing into Moscow's hands by amplifying claims made against then-candidate Joe Biden by Russian-linked Ukrainian figures in the run-up to the Nov 3 election. It also added new findings that Putin either oversaw or at least approved of the election meddling to benefit Trump.