CHARLOTTESVILLE, Va. — Hundreds of people chanted, threw punches, hurled water bottles and unleashed chemical sprays on each other Saturday after violence erupted at a white nationalist rally in Virginia. At least one person was arrested, and one person is reported dead.

Gov. Terry McAuliffe declared a state of emergency, and police dressed in riot gear ordered people at the rally in Charlottesville to disperse after chaotic clashes between white nationalists and counter-protesters.

President Trump condemned the violence on Twitter.

"We ALL must be united & condemn all that hate stands for. There is no place for this kind of violence in America. Lets come together as one!" he tweeted at 1:19 p.m.

A hospital official says one person has died and 19 were injured after a car plowed into a group of protesters in Charlottesville.

University of Virginia Medical Center spokeswoman Angela Taylor confirmed the death to The Associated Press.

The mayor of Charlottesville said via Twitter on Saturday that he is "heartbroken" to announce that a "life has been lost." He did not provide details.

Witnesses say a car plowed into a crowd of people who were protesting the rally, which was held by white nationalists who oppose the removal of a statue of Confederate Gen. Robert E. Lee by the city of Charlottesville.

Small bands of protesters who showed up to express their opposition to the rally were seen marching around the city peacefully by midafternoon, chanting and waving flags. Helicopters circled overhead. As of 12:30 p.m., a city spokeswoman said a single arrest was reported. Emergency medical personnel have responded to eight injuries related to the event.

Right-wing blogger Jason Kessler had called for what he termed a "pro-white" rally to protest the city of Charlottesville's decision to remove a statue of Confederate General Robert E. Lee from a downtown park.

Colleen Cook, 26, stood on a curb shouting at the rally attendees to go home.

Cook, a teacher who attended the University of Virginia, said she sent her son, who is black, out of town for the weekend.

"This isn't how he should have to grow up," she said.

Cliff Erickson leaned against a fence and took in the scene. He said he thinks removing the statue amounts to erasing history and said the "counterprotesters are crazier than the alt-right."

"Both sides are hoping for a confrontation," he said.

It's the latest confrontation in Charlottesville since the city about 100 miles outside of Washington, D.C., voted earlier this year to remove a statue of Lee.

In May, a torch-wielding group that included prominent white nationalist Richard Spencer gathered around the statue for a nighttime protest, and in July, about 50 members of a North Carolina-based KKK group traveled there for a rally, where they were met by hundreds of counter-protesters.

Kessler said this week that the rally is partly about the removal of Confederate symbols but also about free speech and "advocating for white people."

"This is about an anti-white climate within the Western world and the need for white people to have advocacy like other groups do," he said in an interview.

Between rally attendees and counter-protesters, authorities were expecting as many as 6,000 people, Charlottesville police said this week.

Among those expected to attend are Confederate heritage groups, KKK members, militia groups and "alt-right" activists, who generally espouse a mix of racism, white nationalism and populism.

Both the Anti-Defamation League and the Southern Poverty Law Center, which track extremist groups, said the event has the potential to be the largest of its kind in at least a decade.

Officials have been preparing for the rally for months. Virginia State Police will be assisting local authorities, and a spokesman said the Virginia National Guard "will closely monitor the situation and will be able to rapidly respond and provide additional assistance if needed."

Police instituted road closures around downtown, and many businesses in the popular open-air shopping mall opted to close for the day.

Both local hospitals said they had taken precautions to prepare for an influx of patients and had extra staff on call.

There were also fights Friday night, when hundreds of white nationalists marched through the University of Virginia campus carrying torches.

A university spokesman said one person was arrested and several people were injured.

Charlottesville Mayor Michael Signer said he was disgusted that the white nationalists had come to his town and blamed President Donald Trump for inflaming racial prejudices with his campaign last year.

"I'm not going to make any bones about it. I place the blame for a lot of what you're seeing in American today right at the doorstep of the White House and the people around the president."

Charlottesville, nestled in the foothills of the Blue Ridge Mountains, is a liberal-leaning city that's home to the flagship University of Virginia and Monticello, the home of Thomas Jefferson.

The statue's removal is part of a broader city effort to change the way Charlottesville's history of race is told in public spaces. The city has also renamed Lee Park, where the statue stands, and Jackson Park, named for Confederate General Thomas "Stonewall" Jackson. They're now called Emancipation Park and Justice Park, respectively.

For now, the Lee statue remains. A group called the Monument Fund filed a lawsuit arguing that removing the statue would violate a state law governing war memorials. A judge has agreed to a temporary injunction that blocks the city from removing the statue for six months.