A rally in Sacramento, California, was canceled Monday after an angry crowd took to the streets.
Demonstrators gathered outside a county courthouse and began chanting “Black Lives Matter” and “Not my president.”
One person who appeared to be a protester was taken into custody, police said.
Officers used pepper spray to disperse the crowd.
Demonstration leader Brandon Dixon said the rally was to protest the arrest of one of his leaders.
Dixon said he did not know who the protesters were but said they were members of the Black Lives Matter movement.
The rally, which began at a courthouse, ended in a parking lot with people standing on the steps of the courthouse and chanting.
A car pulled up in front of the protesters, prompting them to leave the parking lot.