Arrests after scuffle breaks out at California Trump rally - ABC News

"The violence erupted when the march of about 2,000 people at Bolsa Chica State Beach reached a group of about 30 counter-protesters, some of whom began spraying the irritant[pepper spray], said Capt. Kevin Pearsall of the California State Parks Police. Three people were arrested on suspicion of illegal use of pepper spray and a fourth person was arrested on suspicion of assault and battery, he said.
Two people suffered minor injuries that didn't require medical attention, Pearsall said.
An anti-Trump protester who allegedly used the eye irritant was kicked and punched in the sand by a group of Trump supporters, the Los Angeles Times reported (goo.gl/3C88wT).
Counter-protesters said before the march began that they planned to try to stop the march's progress with a "human wall.""