“Many times INEC server was hacked and attacked and these were done by political parties that brought in Russian and Israeli hackers.”
There were also reports of explosions in the capital Kiev as the air defence was reportedly employed to counter the attacks.
Mr Biden says he is prepared to hold talks with Russia President Vladimir Putin in consultation with his allies from the North Atlantic Treaty Organisation (NATO).
Mr Putin had long left open his participation in the meeting, scheduled to hold between November 15 and 16.
The United States has again accused Russia of planning to use nuclear weapons against Ukraine.
Ukrenerho energy provider announced in Kiev that electricity would be switched off for customers on a staggered basis on Tuesday.
The Polish company, Pern, said it sees no reason to suspect sabotage of the Druzhba pipeline.
The data show that the situation in the Russian economy is now improving after months of downturn, according to The Economist.
The Polish operator of the Druzhba oil pipeline that delivers Russian crude to Europe (PERN) said there was no sign yet that a leak was caused by sabotage.
Britain says it will send anti-aircraft missiles to Ukraine to help defend its skies against Russian attacks.
