Trump supporters, protesters clash in Berkeley, California

( CNN) At least 21 parties were arrested as Trump adherents and antagonists clashed Saturday at a common in Berkeley, California, police said.

Eleven parties were injured, with seven transported to the hospital in uncharted situation, Berkeley Police spokesman Byron White told CNN.

“A large number of fights have appeared and countless fireworks ought to have shed in the crowds, ” Berkeley police said in a statement. “There have also been countless reports of seasoning scatter being used in the crowd.”