US Vice-President Joe Biden has told President-elect Donald Trump to “grow up” and criticised his attacks on the intelligence community.
On Thursday, the Director of National Intelligence, General James Clapper, told a hearing of the Senate Armed services committee that Russian President Vladimir Putin ordered the hack, and said the motive would be revealed next week.
Mr Trump will later today be briefed on allegations Russia meddled in the US presidential election – claims he has cast doubt on.
Mr Biden said it was “absolutely mindless” for the President-elect not to have faith in intelligence agencies.
President Barack Obama last week ordered the expulsion of 35 Russian diplomats from the US over the alleged hacking.
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