Police in the US says security has been tightened at the Capitol in response to a possiblity of an attack on the building.
A statement said the move was prompted by intelligence about threats made by a militia group.
The force said it is prepared for any potential threats towards members of Congress.
The House of Representatives scrapped Thursday’s session after the threat was revealed.
However the Senate, which also convenes in the Capitol, plans to go ahead with a debate on President Joe Biden’s $1.9 trillion Covid-19 relief bill.