With no official communication between the city and protesters, officers were forced to estimate how many demonstrators would show up, [Berkeley Police Officer Byron White] said. Police in riot gear made four arrests and seized numerous prohibited items from the demonstrators by the early afternoon.
The charges for the 20 arrested "include arrests for assault with a deadly weapon and several other felony assaults", the Berkeley police said in a statement.
Trisha, who declined to state her last name after she received online threats for her participation in a previous protest, bandages Rudy McKay's head after he was injured in a clash between Trump supporters and counter-protesters in Berkeley. Ten people were arrested in that protest.
Pro-Trump and Anti-Trump groups met in the streets in Berkeley, California Saturday, descending into violence that swept across social media.
The protests were timed to coincide with the traditional April 15 deadline for USA tax filings. He said he pursued a counterdemonstrator down a side street and found himself surrounded by a dozen protesters in black masks who he said attacked him with sticks and pepper spray.
"The amount of people at the park for the demonstration was in the hundreds", he said. Civic Center Park at noon that would feature speeches by members of the alt-right.
"I got pepper sprayed and hit by a bunch of sticks", anti-Trump activist Al Alegria of Sacramento, California, said.
The location was witness to a similar development, a month ago on the 4 of March, as the same movements had gathered to express their political will, provoking a similar outcome with 10 people arrested at that time.
Protesters on each side held signs in support of their cause.
We chose to show up anyway because this is our livelihood, said Tim Mueller, a farmer who owns the stall, surrounded by protesters on both sides.
"Organizers have promoted Saturday's gathering as a follow-up to an unpermitted March 4 demonstration, when numerous people were hurt due to violence", the city's announcement says.
At least 100 people from both camps eventually moved out of the park and into one of the city's main intersections, where they continued to fist fight, hurl insults and chant at each other.
The protest follows a series of demonstrations - both violent and non-violent - that have swept the country since President Trump took office in January.