Video shows tense standoff between Capitol Police and pro-Trump rioters trying to enter the Senate chamber

• A video shows pro-Trump rioters facing off with Capitol Police outside the Senate chamber.
• Yelling ensues as an officer brandishes a billy club in an attempt to keep the rioters from advancing farther.
• Outnumbered, the officer backs off, and the crowd eventually takes over the hall after making their way through the first floor.
• About the same time, an armed standoff was taking place by the door of the House chamber, where officers had guns drawn.

A video posted on Twitter Wednesday shows tense moments before rioters overtake the Senate chamber in the US Capitol.

Amid yelling and screaming, a Capitol Police officer tries to hold a group of pro-Trump rioters back as they make their way through the first floor of the building.

The officer then backs off and picks up a billy club that had been dropped. Outnumbered, the officer tries to tell the group to back off.

Igor Bobic, the HuffPost reporter who posted the video, described it as taking place just before the group managed to enter the Senate chamber.

About the same time, Capitol Police had their guns drawn in another standoff around the main door to the House chamber.