A auto reportedly plowed through peaceful protesters marching against a white nationalist rally in Charlottesville, Virginia, on Saturday. Police said they are investigating the cause of the crash.
They clashed with another group of people who were opposing this rally of white nationalists.
Law enforcement officers say that 19 people were injured in horrifying incident while one person has passed away due to injuries sustained from being hit by the vehicle.
The driver was in police custody, the city said.
State police tweeted that some in the crowd were using pepper spray.
"It's been going on for a long time in our country", Trump said. There are not "many sides" here, just right and wrong, " Representative Adam Schiff, a Democrat from California, said on Twitter.
Saturday's rally was the latest event drawing white nationalists and right-wing activists from across the country to this Democratic-voting town - a development precipitated by the city's decision to remove symbols of its Confederate past. Local police estimate 6,000 people are attending the rally, and 1,000 law enforcement officers have been deployed to the city.
"The hate and the division must stop, and must stop right now".
The clashes highlight how the white supremacist movement has resurfaced under the "alt-right" banner after years in the shadows of mainstream American politics.
Before the auto crash, Trump condemned the earlier clashes on Twitter, writing, "We ALL must be united & condemn all that hate stands for".
In his remarks Saturday, Trump mentioned the strong economy and "the many incredible things in our country, so when I watch Charlottesville, to me it's very, very sad".
The protest turned violent well ahead of the rally's official noon start time.
US President Donald Trump said he was closely monitoring the events and condemned the "egregious display of hatred, bigotry and violence, on many sides".
Her comments came as other Republican governors, like Nevada Gov. Brian Sandoval, denounced violence in Charlottesville linked to a white nationalist rally.
The turbulence began Friday night, when the white nationalists carried torches though the university campus in what they billed as a "pro-white" demonstration. "We have to respect each other, ideally we have to love each other". Lets come together as one!
But some of the white nationalists cited Trump's victory as validation for their beliefs, and Trump's critics pointed to the president's racially tinged rhetoric as exploiting the nation's festering racial tension. When pressed on what exactly the president saw or heard from the counterprotesters that was bigoted or hateful, the spokesman did not respond.
Attorney General Jeff Sessions said in a statement obtained by CBS News' Paula Reid that he is "in contact" with Justice Department officials on the scene, and DOJ stands by the president in condemning violence, and any hate and intolerance.
Charlottesville's police chief Al Thomas said that a 32-year old woman was killed while crossing a street, when a vehicle surged into a crowd of what witnesses said were counter-demonstrators.