WASHINGTON (Reuters) – Paul Manafort, a former campaign chairman for U.S. President Donald Trump, surrendered to federal authorities on Monday in the first charges stemming from a special counsel investigation of possible Russian meddling in the 2016 U.S. presidential election.

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Manafort arrived at the Federal Bureau of Investigation Washington field office, television video showed. He was to surrender to federal authorities, the New York Times and CNN reported, citing sources.

The charges against Manafort would be the first arising from the investigation by Justice Department special counsel Robert Mueller, who was appointed to look into alleged Russian meddling to sway the election in favor of Trump.