US to slap new sanctions on Russia for election interference, cyber attack: Sources

The United States will announce sanctions onRussiaas soon as Thursday for alleged election interference and malicious cyber activity, targeting several individuals and entities, people familiar with the matter said.

The sanctions, in which 30 entities are expected to be blacklisted, will be tied with orders expelling about 10Russian officials from the United States, one of the people said.

The United States is also expected to announce aggressive new measures targeting the country's sovereign debt through restrictions on USfinancial institutions' ability to trade such debt, according to another source.

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The White House, the USState Department, and the USTreasury Department did not immediately respond to requests for comment.

The action will add a new chill to the already frosty relations between Washington and Moscow, which has tested the West's patience with a military build-up near Ukraine.

The wide-ranging sanctions would come partly in response to a cybersecurity breach affecting software made by SolarWinds Corp that the USgovernment has said was likely orchestrated byRussia. The breach gave hackers access to thousands of companies and government offices that used the company's products.

Microsoft President Brad Smith described the attack, which was identified in December, as "the largest and most sophisticated attack the world has ever seen."

The United States also intends to punish Moscow for alleged interference in the 2020 USpresidential election. In a report last month, USintelligence agencies saidRussian President Vladimir Putin likely directed efforts to try to swing the election to then-President Donald Trump and away from now-President Joe Biden.

Biden has also vowed to take action on reports thatRussiaoffered bounties to Taliban militants to kill UStroops in Afghanistan.

The expected moves by the Biden administration are likely to exacerbate tensions in a relationship that slumped to a new post-Cold War low last month after Biden said he thought Putin was a "killer."

In a call on Tuesday, Biden told Putin that the United States would act "firmly" to defend its interests in response to those actions, according to U.S. officials' account of the call.

Biden also proposed a meeting with Putin "in a third country" that could allow the leaders to find areas to work together.

In the past few weeks, Washington and its NATO allies have been alarmed by a large build-up ofRussian troops near Ukraine and in Crimea, the peninsula that Moscow annexed from Ukraine in 2014.

"The hostility and unpredictability of America's actions force us, in general, to be prepared for the worst scenarios," Kremlin spokesman Dmitry Peskov told reporters last week, anticipating the new sanctions.