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US accuses Russia of cyber attacks US accuses Russia of cyber attacks
(35 minutes later)
US officials have formally accused Russia of cyber attacks against political organisations in order "to interfere with the US election".US officials have formally accused Russia of cyber attacks against political organisations in order "to interfere with the US election".
Recent hacked emails are "consistent with the methods and motivation of Russia-directed efforts," the Department of Homeland Security said. Recent hacked emails are "consistent with the methods and motivation of Russia-directed efforts", the Department of Homeland Security said.
Some states have seen "scanning and probing" attempts made on their "election-related" systems, it added. Data revealing discussions within the Democratic Party was hacked earlier this year.
A number of embarrassing emails have come to light during the 2016 campaign. Some states reported "probing" attempts made on "election-related" systems.
However, officials said those attempts could not be directly linked to the Russian government.
A joint statement from the Department of Homeland Security and the Director of National Intelligence on Election Security said high-ranking officials at the Kremlin were almost certainly involved in the successful attacks.
"We believe, based on the scope and sensitivity of these efforts, that only Russia's senior-most officials could have authorized these activities," it said.
However, altering any actual ballots or election results would be "extremely difficult", they said, because of a decentralised system and multiple checks and balances.
A number of embarrassing emails have come to light during the 2016 election campaign.
In July, a hacker calling himself Guccifer 2.0 claimed responsibility for the release of documents from the Democratic Party.
Gigabytes of files including emails and other documents that revealed the inner workings of the Democratic National Committee (DNC) were taken.
At an early stage, many US officials linked the breach to Russia. At the time, Moscow denied any involvement and denounced the "poisonous anti-Russian" rhetoric from Washington.
The leaked emails appeared to show that Democratic Party officials were biased against Bernie Sanders in his primary race against Mrs Clinton.
The hack led to the resignation of the party chairwoman Debbie Wasserman Schultz and sparked protests at the national convention in Philadelphia.