President Donald Trump’s ex-national security adviser, Michael Flynn, has been charged with making a false statement to the FBI in January.
Mr Flynn was forced to resign the following month after misleading the White House about meeting the Russian ambassador before Mr Trump took office.
The charges were brought by Special Counsel Robert Mueller, as part of his investigation into alleged Russian meddling in the 2016 US election.
Mr Flynn is due in court shortly.
He is accused of “wilfully and knowingly” making “false, fictitious and fraudulent statements”.
He is the most senior member of the Trump administration so far to have been indicted by the Mueller investigation.
In October, Mr Trump’s former presidential campaign manager, Paul Manafort, was accused of conspiring to defraud the US in his dealings with Ukraine. It also emerged that another ex-aide, George Papadopoulos, had pleaded guilty to making false statements to FBI agents.
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According to the charges faced by Michael Flynn, he is accused of falsely telling FBI agents that “on or about December 29 2016” he did not ask Russia’s US ambassador to “refrain from escalating the situation in response to sanctions that the United States had imposed against Russia that same day”.