Officials in Wisconsin are preparing to conduct a full recount of the votes from the US election in the state, which was narrowly won by Donald Trump.
A formal request for the recount was filed by the Green Party’s Jill Stein.
Dr Stein, the Green Party’s candidate, has also pledged to file for recounts in Michigan and Pennsylvania.
The result would need to be overturned in all three states to change the outcome of the election, something analysts say is highly unlikely.
Dr Jill Stein reportedly wants to make sure computer hackers did not skew the poll in favour of Mr Trump.
In a statement, the Wisconsin Elections Commissions said, it had received two recount petitions from the Jill Stein campaign and from Rocky Roque De La Fuente, a businessman who ran unsuccessfully to be the 2016 Democratic presidential nominee.
“The Commission is preparing to move forward with a statewide recount of votes for President of the United States, as requested by these candidates,” said Wisconsin election commission administrator Michael Haas.
He said the recount would begin in the week after Dr Stein’s campaign has paid the fee, which the commission was still calculating.
Dr Stein’s campaign needs to raise millions of dollars to cover the fees for the vote recount in all three states.
Dr Jill’s website says nearly $5.3m (£4.2m) has already been raised toward a $7m target. It says this is enough to fund the recounts in Wisconsin and Pennsylvania.
Concerns over possible Russian interference had been expressed in the run-up to the vote.
Voting rights lawyers who urged candidates to request recounts, John Bonifaz and J Alex Halderman, have said the results need to be closely analysed.
However, the fact that the results in the three states was different from what polls predicted was “probably not” down to hacking, Mr Halderman said.
“The only way to know whether a cyber-attack changed the result is to closely examine the available physical evidence?,” he wrote.
Hillary Clinton has not demanded a recount of the election results, despite calls from some experts for her to do so.
The deadline for the petition for the recount in Wisconsin was Friday, while Pennsylvania’s deadline is Monday, and Michigan’s is Wednesday.
Wisconsin provides only 10 votes in the crucial electoral college that gave Mr Trump victory in the 8 November election.
Wins there for Mrs Clinton, as well as in Michigan (16 electoral votes) and Pennsylvania (20 electoral votes), would have clinched the presidency for the Democrat.
US officials have said there was no evidence of election tampering in the three states where Republican candidate Donald Trump had razor-thin victories over his Democratic rival.
Mr Trump’s camp has made no public comments on the recounts issue.
Mr Trump won 290 electoral votes in the November election, while Mrs Clinton had 232 votes.
Michigan is yet to declare final results.
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