June 4 (UPI) -- Protests nationwide have become more peaceful since Minnesota authorities charged all four officers involved in the death of George Floyd, but violence continued in some cities -- including New York City, where three officers were severely injured by an armed assailant.
The New York City Police Department said early Thursday three officers were attacked in Brooklyn by a man who stabbed one officer in the neck, then stole a handgun and shot two others before the attacker was shot.
The attack occurred in Brooklyn's Flatbush neighborhood just before midnight Wednesday.
"We had a chaotic scene," NYPD Commissioner Dermot Shea told reporters early Thursday. "We had two police officers shot in the hand, and we have a third police officer that is stabbed in the neck.
"All police officers, at this point in time ... are in stable condition and are expected to recover."
Officials said the attacker was critically injured.
In Washington, D.C., mostly peaceful demonstrations went late into the night near the U.S. Capitol and the White House -- which had been blocked off by police -- as well as the Trump International Hotel.
There was an increased federal and local police presence in the city, which saw repeated violence and vandalism over the past week.
The show of force, ordered by U.S. Attorney William Barr, included federal agents, troops and police.
In California, hundreds of protesters in the San Francisco Bay area defied local curfews. After declining to arrest violators on Tuesday, San Francisco police arrested nearly two dozen on Wednesday outside the city's Hall of Justice.
Earlier, thousands had marched through San Francisco's Mission District.
In Los Angeles, Mayor Eric Garcetti said he plans to lift the city's curfew on Thursday.
The ACLU Foundation of Southern California has filed an emergency lawsuit on behalf of Black Lives Matter-Los Angeles, which challenges the "draconian" curfews imposed throughout Southern California.
The suit argues that the curfews constitute an "extraordinary suppression of all political protest in the evening hours," the organization said in a press release, adding that curfews violate the First Amendment as well as the U.S. Constitution's guarantee of freedom of movement.
"The city and county of Los Angeles are attempting to use these curfews to suppress Black Lives Matter-L.A.'s right to protest," group co-founder Melina Abdullah said in the release.
In Seattle, thousands of protesters rallied in the city's Capitol Hill neighborhood and at City Hall.
Just before a citywide curfew took effect at 9 p.m., Seattle Mayor Jenny Durkan and Police Chief Carmen Best announced it would be lifted immediately. They said they decided to rescind the curfew following feedback from community leaders and protesters who "wanted to ensure no peaceful individuals" were arrested.
"Chief Best believes we can balance public safety and ensure peaceful protests can continue without a curfew," Durkan said.