Donald Trump's ex-campaign manager turns himself into the FBI

Paul Manafort is reportedly facing charges in connection with the investigation into collusion with Russia

His associate Rick Gates has also been brought in for questioning.

The nature of the charges are not yet known, but they are the first people to be arrested as part of special counsel Robert Mueller's investigation into alleged collusion between the Trump campaign and Russia.

NBC's Pete Williams is in Washington with the latest.

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