Flag-carrying demonstrators were joined by members of far-right groups including the Proud Boys, some wearing helmets and bullet-proof vests.

Earlier supporters swarmed Mr Trump's motorcade as he drove past on his way to his golf course.

Joe Biden won the 3 November election.

On Friday, he solidified his victory with a projected win in the state of Georgia - making him the first Democratic candidate to take the state since 1992.

He now has 306 votes in the electoral college - the system the US uses to choose its president - which far exceeds the 270 threshold to win.

Mr Trump's supporters kicked off the demonstrations at about noon local time (17:00 GMT) near Freedom Plaza, just east of the White House, and were to head towards the Supreme Court.

They have been using different names for the event, including Million MAGA March - using the acronym for Mr Trump's Make America Great Again slogan - as well as the March for Trump and Stop the Steal DC.

As well as more mainstream Trump supporters, members of the far-right Proud Boys and the Oath Keepers militia group were among the marchers. Conspiracy theorist Alex Jones addressed the crowd.