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For more than fifty days, have carried on. While many have been peaceful, those demonstrations have also been marked by violence, vandalism, arson, arrests and allegations of police brutality.

Last week, the state's U.S. Attorney called for an investigation into why some protesters were being

Over the weekend, protesters pulled down barricades, moved them into streets, and attempted to light a building on fire. Sunday's demonstrations ended with protesters being dispersed with gas by federal law enforcement, the Portland Police said in a tweet.

While the protests are now getting national attention, allegations of racism and calls for reform have long been a part of the city.

Why did the protests start?

The death of in May was the spark that lit demonstrations nationwide, with tens of thousands demanding police reform, accountability and, above all, re-establishing that Black Lives Matter.

In Portland, like so many cities across the country, demonstrations are calling for justice in the deaths of Floyd, , and countless other Black lives that have ended in violence.

But what began as a call for justice and accountability has given way to a melting pot of demonstrations.

Protests have ranged from peaceful marches during the day to unidentified protesters taking part in violent demonstrations that devolve into arson and vandalism. U.S. President Donald Trump and other federal officials have characterized some of these events as the actions of "anarchists and agitators."

Now weeks have gone by with officers and protesters clashing, resulting in injuries on both sides, vandalism, arson, and allegations of brutality.

In the last week alone, at least 40 protesters were arrested on charges varying from resisting arrest to disorderly conduct, according press releases from the PPB.

A history of racism

Portland has long been a place where tensions between opposing demonstrators have been a source for conflict.

In recent years, some protests have become a target for hate groups seeking to antagonize other people who come out to defend the rights of marginalized communities such as immigrants, people of color and members of the LGBTQ community.

"History will tell you that it's a racist city, which it is and has been," said Sam Sachs, a community member who spoke during a press conference held by the Sunday. "Oregon was created as White utopia."

Oregon's complicated racial tensions start in the 1800's, with laws put in place to keep people of color out of the state. The 14th Amendment was not passed there , which given citizenship to Black people.

In the early 1900's, the city's Board of Realty passed a "code of ethics," which prohibited realtors from selling homes in White neighborhoods to Black people.

This hasn't been lost on the community. Sachs, whose family has been in the area since the 1940's, founded the , an organization which is focused on ending hate and racism through education, engagement and advocacy.

While he said that right now Portland is known as a "hotbed for violence," it is also "a city of opportunity."

"(It's) a city of love. A city of growth. A city that cares about its police. A city that cares about its Black and indigenous community members, gay, lesbian, transgender, cares about everyone. Portland is a city of love and hope."

Many other community members who spoke echoed his sentiments and decried the violence that has come with the calls for justice.

, who was also present during the press conference, said while he understands that citizens are tired of the brutality they see at the hands of police, he's tired of the violence, division and continued racism he and his community have faced.

"You want to know what tired looks like, ask us what tired looks like. Because we are the ones who couldn't purchase a house or rent a place anywhere near a certain place because nobody wanted people like us to be in it. We couldn't go to this school or that school or we couldn't do a number of different," the pastor said.

"It's very important that we come together, and I'm not as concerned about what we are tired of, I'm very concerned about the world that we can make together."

Fight over federal agents arresting protesters

As protests have ramped up over the last few weeks, the Trump administration has sent in federal agents from the to respond to the city.

admitted to being one of the agencies involved in arresting protesters and said in a statement that they were called in because "violent anarchists have organized events in Portland over the last several weeks with willful intent to damage and destroy federal property, as well as, injure federal officers and agents."

"These criminal actions will not be tolerated," the statement said.

They have not been well received, with the mayor, governor and several other state and local officials calling for the federal involvement to end, saying it's only throwing gas on the flames.

"People are being literally scooped off the street into unmarked vans, rental cars," told CNN on Sunday. "Apparently, they are being denied probable cause, and they're denied due process. They don't even know who's pulling them into the vans."

There are "dozens if not hundreds of federal troops descending upon our city, and what they're doing is they are sharply escalating the situation," the mayor added. "Their presence here is actually leading to more violence and more vandalism."

After people were seen being taken by federal officers without badges and put into unmarked vans, U.S. Attorney Billy J. Williams of the District of Oregon has requested a federal investigation, and Oregon Attorney General Ellen Rosenblum filed a lawsuit in federal court against DHS Friday.