Footage exclusively recorded by DailyMail.com shows the moment federal agents arrested demonstrators outside Portland's courthouse during the 60th night of protests in the city as police discovered a bag of loaded rifle magazines and Molotov cocktails at a park nearby. 

A crowd of less than 500 gathered in downtown Portland outside the federal building late Sunday for another night of protests. What started out as a calm night after a very hot day where the temperature reached 100 degrees slowly turned into a night of violence for both sides.

Around 1.20am, DailyMail.com recorded video that shows two federal police officers chasing down a female protester and throwing her to the ground in the middle of street. 

At one point another protester with a baseball hit one of the officers over the back with it and another demonstrator tried to pry an officer off the woman.

The woman who was pinned to the ground with the officer's full body weight on her, screamed: 'Get off of me!' Several seconds later with her face being shoved to the ground she cried out: 'I can't breathe!'

It appears in the video the officer had both of his fists balled up in the small of her back with the entire weight of his body.

Another protester came up to the woman and attempted to help her while she was being arrested. The young woman who was crying and bleeding from her lip said: 'I am Noelle Mandolfo from Denver, Colorado. I was just standing there and this giant f**king fed came at me for no reason with a baton. Can someone collect my belongings?'