US Secretary of State Mike Pompeo has said it is unacceptable for protesters to enter the Capitol Hill building.
"The perpetrators of the incident must be brought to justice. I believe in the fundamental right of every citizen to peaceful protest to achieve their goals," he said.
It should be noted that Donald Trump supporters entered the Capitol Hill (Parliament Building) building, there were clashes between Trump supporters and the police. The Capitol building was locked down after the riots. A curfew was imposed in Washington DC after a riot by President Trump supporters at the US Parliament building.