The leader of a far-right group in the US - Proud Boys, has been arrested in Washington DC on suspicion of burning a Black Lives Matter flag last month.
Enrique Tarrio faces misdemeanour destruction of property charges, police said, reports the BBC.
He has reportedly admitted torching a banner taken from a black church during a rally in December in the city.
President Donald Trump has been urging supporters to gather in the capital this week for another demonstration.
On Wednesday, members of Congress are due to certify Democratic President-elect Joe Biden's election victory before he takes office on 20 January.
Tarrio has said on the social media app Parler that the Proud Boys will "turn out in record numbers on Jan 6th", referring to his members as "the most notorious group of extraordinary gentlemen".