(CNN) Thousands protesting Donald Trump's victory in the presidential election took to the streets for a third night of demonstrations and vigils in several US cities.
An anti-Trump rally in Portland, Oregon, revved up as protesters confronted police Thursday night. What started out as a peaceful march, with more than 4,000 people, quickly turned violent.
Over the course of the evening, "anarchists" in the crowd threw objects at officers, vandalized local businesses and damaged cars, Portland Police Sgt. Pete Simpson said.
Protesters marched through Portland's streets Thursday night.
Police publicly declared a "riot" due to "extensive criminal and dangerous behavior" and called the protest "unlawful," according to posts on the department's Twitter page.
The crowd was dispersed using "less lethal munitions" and at least 26 protesters were arrested, police said.
Protests and marches continued in other US cities including Los Angeles, Philadelphia, Denver, Minneapolis, Baltimore, Dallas and Oakland, California.
A protester kicks a bank's window during Thurdsay night's protest in Portland.
The mood in the streets where protesters marched was as varied as the locations.
Some of the roughly 1,000 protesters in Oakland broke store windows, left graffiti on buildings and threw M-80 firecrackers, Molotov cocktails and bottles at police officers, authorities said.
Eleven people were arrested in Oakland, including someone who had seven Molotov cocktails in his possession, police said. Some of those arrested are accused of assaulting police officers.
In Los Angeles, about 185 protesters were arrested Thursday night into Friday morning, police Officer Norma Eisenman said -- including some on suspicion of blocking roads, and minors accused of violating curfew.
People gathered outside Los Angeles' City Hall chanting "not my president." As in Oakland, there were reports of people throwing rocks and bottles at police officers and vandalizing police cars with graffiti, CNN affiliate ABC reported. At least one person was held on suspicion of assaulting an officer, Eisenman said.
Anti-Trump protests after election
Nearly 1,000 students and faculty members at Rutgers University staged a rally in downtown New Brunswick, New Jersey, to protest President-elect Donald Trump on Wednesday, November 16.
At least 25 US cities have seen protests since Trump won the presidential election.
Students hold signs in front of the Supreme Court in Washington during a protest on Tuesday, November 15.
Activists use a banner to block traffic on Interstate 395 during an anti-Trump protest in Washington on Monday, November 14.
Anti-Trump protesters in New York hung an upside-down American flag from the side of the Manhattan Bridge on November 14.
Demonstrators distribute safety pins as a sign of solidarity against intolerance during a rally against Trump in New York on Saturday, November 12.
Demonstrators march to Trump Tower in Chicago on November 12.
People protest Trump during a march in downtown Miami on Friday, November 11.
Hundreds of Trump protesters hold a demonstration in New York's Washington Square Park on November 11.
A man walks by anti-Trump graffiti in downtown Oakland, California, on November 11. Thousands of protesters have wreaked havoc on the city during anti-Trump marches, causing vandalism, fires and destruction of property.
A protester kicks the window of a Bank of America branch in Portland, Oregon, on November 10. What started out as a peaceful march with more than 4,000 people
quickly turned violent. Portland police publicly declared a "riot" because of "extensive criminal and dangerous behavior," according to posts on the department's Twitter page.
Demonstrators flood the 101 Freeway in Los Angeles on November 10.
Police officers stand guard as they slowly clear Trump protesters from the 101 Freeway in Los Angeles on November 10.
Demonstrators protest in Denver on November 10.
Police officers look on as someone protests in Portland on November 10.
Trump protesters march toward Interstate 94 in Minneapolis on November 10.
Numerous cars at a Toyota dealership were smashed as people protested in Portland on November 10.
Trump protesters chant outside the White House on November 10.
Protesters set an effigy of Trump on fire outside Los Angeles City Hall on Wednesday, November 9.
Demonstrators march down Second Avenue in Seattle on November 9.
Police respond to a fire set by anti-Trump protesters in Oakland, California, on November 9. Police said some protesters threw Molotov cocktails, rocks and fireworks at officers.
Protesters in Chicago display anti-Trump signs near the Trump International Hotel and Tower on November 9.
Trump protesters take to the streets in Philadelphia on November 9.
Thousands march down Fifth Avenue in New York on November 9. Authorities estimated as many as 5,000 people protested Trump's victory outside Trump Tower.
Protesters rally against Trump in New York's Union Square on November 9.
Demonstrators march past Radio City Music Hall in New York on November 9.
People listen to speakers protesting Trump's election in Seattle on November 9.
A woman argues with police officers during a protest in New York on November 9. Erin Michelle Threlfall, the woman pictured, told
The Huffington Post she was attempting to intervene on behalf of a man she says the police were beating.
Sasha Savenko, left, and Sydney Kane join thousands of protesters in Seattle on November 9.
Crowds rally outside Trump Tower in New York on November 9.
Charles Watkins speaks out at an anti-Trump protest in Denver on November 9.
Outside the White House on Thursday night, protesters gathered with signs, some of which said "Donald Trump is a racist."
Many demonstrations were peaceful, if not tense and somber.
In Philadelphia, protester Deb Bentzel said that "as a woman and someone who believes all people, regardless of their race, religion or citizenship status should be supported and embraced by this country," she marched to reject "the racism, hate, misogyny and fear that this man (Trump) projects and fosters in others."
In Minneapolis, protester Lauren Peck shared similar sentiments as she gathered with others at the Humphrey School of Public Affairs, named for the late US senator and Vice President Hubert Humphrey, at the University of Minnesota.
Cars at a Toyota dealership in Portland were smashed during Thursday night's protests.
"I feel it's important to voice that I have serious concerns about this President-elect and the racism, sexism, xenophobia and so much more that does not represent me or so many in my life. The mood here is peaceful, positive and energetic," Peck said.
Photos: When the people protest the president
Trump tweeted that the demonstrations that began hours after polls closed Tuesday night were "very unfair."
Trump's presidency 'needs to be opposed'
Documentary filmmaker Michael Moore also joined the pack of protesters outside Trump Tower in New York this week.
Portland police said they used pepper spray to disperse protesters after the demonstrators threw things at the officers.
"I was very proud of the fact that so many people came out because his presidency needs to be opposed right now," Moore told Don Lemon on "CNN Tonight" Thursday.
"Literally thousands of people coming down the street and I just joined them," Moore said. "There's a lot of fear and a lot of panic amongst a lot of people right now."
CNN's Sheena Jones, Emanuella Grinberg, Cheri Mossburg and Jason Hanna contributed to this report.