A Trump supporter clashes with protesters outside a rally for Republican presidential candidate Donald Trump, Thursday, April 28, 2016 in Costa Mesa, Calif. | AP At least 20 arrested as protesters clash outside Trump rally

Chaos erupted outside Donald Trump's rally on Thursday night in Costa Mesa, California, with about 20 people arrested as protesters swarmed the streets outside an Orange County amphitheater near the Republican candidate's gathering that drew more than 30,000.

Protesters smashed the window of at least one police car, according to media reports on the scene, where people waved American and Mexican flags.

"This is the anger people have against Trump," a 21-year-old man identified as Jose Cruz said in speaking with the Los Angeles Times about the protests. "It's not because he's white — it's because of what he's said."

The Orange County Sheriff's Department tweeted late Thursday night that there were no major injuries and approximately 20 people arrested.

#OCSDPIO Post Trump Rally Protest over. Approx 20 arrests by Costa Mesa PD. No major injuries. Crowd dispersed by 11pm. No further updates — OC Sheriff, CA (@OCSD) April 29, 2016





A CNN reporter shared a photo of a Trump supporter who was punched in the face in a related skirmish.

A @realDonaldTrump supporter just got punched in the face as a scuffle broke out in the street: pic.twitter.com/3h3Fllm3V3 — Jeremy Diamond (@JDiamond1) April 29, 2016





On his Twitter feed after the rally, Trump made no reference to the incidents, but touted his large crowd size as he had done during the event itself.

"Our rallies are the safest place to be on Earth, believe me. 31,000 people tonight, and we have thousands of people outside where they can't get in," Trump told his audience.

Thank you Costa Mesa, California! 31,000 people tonight with thousands turned away. I will be back! #Trump2016 pic.twitter.com/4P0tzvZn0e — Donald J. Trump (@realDonaldTrump) April 29, 2016



