The United State vice President Joe Biden said, Washington would be sending Moscow "a message" regarding its alleged hacking and dismissed suggestions that the White House has failed to respond to Russian meddling in the US election.

The NBC reported, Biden paused and gave a wry smile when asked why the US has not acted a week after US officials formally accused the Russian government of trying to interfere with the 2016 White House race.

Biden said, smiling and nodding his head gently, that, "We're sending a message" to Russian President Vladimir Putin.

"We have the capacity to do it and the message will be sent. He'll know it and it will be at the time of our choosing and under the circumstances that have the greatest impact."

Asked whether the public will know, Biden responded tersely: "I hope not."

The CIA was preparing a retaliatory cyberattack "designed to harass and 'embarrass' the Kremlin leadership."

A joint statement from the Department of Homeland Security and Office of the Director of National Intelligence was the first official accusation by Washington against Moscow in a spate of email hacks.

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