'Power to the people': Floyd's brother talks at NYC memorial

New Yorkers gathered Thursday for a memorial service for George Floyd, whose death last week at the hands of Minneapolis police has prompted ongoing global protests against police brutality.

"You are not alone," the large crowd chanted before an emotional Terrence Floyd, wearing a mask and a T-shirt bearing his brother's likeness, thanked them for their support.

“I thank God for you all showing love to my brother,” he said.

Of the demonstrations that have engulfed the city and the nation, and the violence that has taken place, he said, “I’m proud of the protests but I'm not proud of the destruction. My brother wasn’t about that. The Floyds are a God-fearing family.”

“Power to the people, all of us," he said.

Munira Siddiq, 30, of Queens, was overcome with emotion when Floyd spoke, saying she could physically feel his pain standing so close to him.

“If even a seed of change comes from this, it will have all been worth it,” she said, before joining the march over the Brooklyn Bridge. “If we don’t do this, nobody is going to.”

RELATED: 3 other Minneapolis police officers charged in George Floyd's death, Chauvin charges upgraded

The demonstrators were gathered in Brooklyn's Cadman Plaza, where videos were taken Wednesday night of officers using batons and pepper spray on protesters who remained after the 8 p.m. curfew.

Gov. Andrew Cuomo and Mayor Bill de Blasio sought to deflect criticism over the harsh tactics. Both Democrats said they had not seen the widely shared videos.

De Blasio spoke at the memorial, with the crowd booing and heckling from the moment he arrived, shouting over him as he urged that Floyd’s death not be in vain. “We have too much to change in this city and this country,” he said.

Even some of the speakers took shots at the mayor, criticizing his management of the NYPD and his administration’s response to the coronavirus.

Earlier, de Blasio said police have used “a lot of restraint” overall and added, “but if there’s anything that needs to be reviewed, it will be.”

A protestor looks toward National Guard troops posted outside the District Attorney's office during a peaceful demonstration over George Floyd’s death on June 3, 2020 in Los Angeles, California. (Photo by Mario Tama/Getty Images)

Cuomo said, “If they hit somebody, if somebody’s standing there and they just walked up to somebody and hit them with a baton, clearly that’s wrong. But I don’t believe that’s what happened. If they did that, it’s wrong.”

The governor and mayor said protesters should abide by the 8 p.m. curfew put in place earlier this week to deter the violence, vandalism and destruction that followed protests Sunday and Monday nights.

“If you are violating the curfew and you refuse to leave so you continue to violate the curfew, the police officers have to enforce the law, which is: you’re supposed to off the street," Cuomo said.

The mayor said, “If at a certain point, officers say, ‘It’s time, people need to go now,’ people need to listen to that."

The citywide curfew, New York’s first in decades, is set to remain in effect through at least Sunday, with the city planning to lift it at the same time it enters the first phase of reopening after more than two months of shutdowns because of the coronavirus.

Wednesday night unfolded without the vandalism and smash-and-grab sprees that forced merchants around the city to board their stores up preemptively, but police said a man ambushed officers on an anti-looting patrol in Brooklyn shortly before midnight, stabbing him in the neck. The attacker was shot by responding officers and was in critical condition.

RELATED: What to expect in the George Floyd murder case as prosecutors ask for patience

Two officers suffered gunshot wounds to their hands in the chaos, but all three wounded officers were expected to recover.

Officer Yayonfrant Jean Pierre, who was stabbed in the neck, and the other wounded officers, Randy Ramnarine and Dexter Chiu, were expected to recover.

De Blasio said he was “not going to theorize on” possible motives for the attack.

Protests over Floyd's death were planned around the city for Thursday along with a statewide moment of silence at 2 p.m. to coincide with another memorial for Floyd taking place in Minneapolis.

Protesters march in Manhattan over the killing of George Floyd by a Minneapolis Police officer on June 03, 2020 in New York City. (Photo by Spencer Platt/Getty Images)

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Jennifer Peltz, Michael R. Sisak, Karen Matthews, Brian Mahoney and Jake Seiner in New York City and Marina Villeneuve in Albany contributed to this report.