Late in the day, as the pro-Trump rally was coming to an end, police ordered counter-demonstrators to disperse from two adjacent parks, prompting some in the crowd to hurl rocks and other projectiles at officers. Police used tear gas and flash bangs to clear the area, KATU-TV reported. Several journalists at the scene said they were blocked in, along with demonstrators, and were told by officers that they were detained pending investigation for disorderly conduct.
The groups were separated by a wall of officers, heavily armed and wearing protective body armor, from local and federal police agencies.
Extra fuel was added to the fire when Mayor Ted Wheeler called on the federal government to revoke the already-issued permit for a group planning the Trump Free Speech Rally in Terry Schrunk Plaza.
City leaders questioned the timing of the rally so soon after the TriMet attacks.
A demonstration called Defend Portland! The security team, he says, includes about 50 to 60 private individuals, some of with military experience.
A conservative protester (R) yells at a group of anti-fascist during competing demonstrations in Portland, Oregon, U.S. June 4, 2017.
"Let them march alone", Jackson said.
"There will be a robust law enforcement presence due to online threats of violence between different groups", the Portland Police wrote in a statement in the days ahead of the rallies.
Among other changes, they wanted police out of riot gear at political events.
Hundreds of pro-Trump protesters and counter-protesters have gathered in downtown Portland on Sunday. Several more arrests were made during that process.
Thousands of demonstrators and counter protesters converged in downtown Portland, Oregon, on Sunday, a day marked by multiple arrests and clashes between police and protesters.
On each side protesters carried signs reflecting a variety of causes.
Through the week, as the Portland stabbing deaths claimed national attention, Gibson has been active on social media, and in radio and television interviews, denouncing Wheeler and promoting the rally. "You call it terrorism; I call it patriotism".
One of the first arrests took place at a rally at Terry Schrunk Plaza in downtown Portland, Oregon. He said he realized later he hadn't accomplished his goal of making liberal Portlanders think about other views. If you would like to discuss another topic, look for a relevant article. It does not stop with one person. "We need to start spreading love to get rid of this hate". "Today could be a great start".
To the north, hundreds of black-clad, left-wing, anti-fascist protesters chanted, blared music and held paper-mache spiders and skeletons, which have become signature icons at Portland protests.
"Portland, I mean no disrespect, but you've gotten insane", he said.
The rally kicked off at 2 p.m. with songs and a call by organizers for everyone in attendance to be respectful. They repeatedly praised the Trump administration.
"People are really aware of who's around them". They say those who have been identified as participating in criminal activity will be arrested. They also had to dodge balloons filled with a foul-smelling liquid, Fox 12 reported.