The US Capitol has gone into lockdown as supporters of US President Donald Trump rally outside Congress, which is debating an objection to president-elect Joe Biden's certification.
An announcement was played inside the building as politicians were meeting and expected to vote to affirm Mr Biden's victory.
Due to an "external security threat", no-one could enter or exit the Capitol complex, the recording said.
Both chambers abruptly went into recess.
The skirmishes occurred outside the building in the very spot where president-elect Biden will be inaugurated in just two weeks.
Protesters tore down metal barricades at the bottom of the Capitol's steps and were met by officers in riot gear.
Some tried to push past the officers who held shields and officers could be seen firing pepper spray into the crowd to keep them back.
Some in the crowd were shouting "traitors" as officers tried to keep them back.
More to come.
