At least 4 arrested in California pro and anti-Trump rallies

Police say at least four people have been arrested after violence broke out today between groups of supporters and detractors of President Donald Trump holding rallies in downtown Berkeley.
About 200 people were at Berkeley's Martin Luther King Jr. Civic Center Park when several people started pushing each other. Dozens of police officers in riot gear were standing nearby and quickly arrested one man. Others were arrested as several fistfights broke out.
Demonstrators have left the park and are walking on Berkeley streets while police closely follow them. The rally follows a March 4 confrontation planned by several of the same groups that left several people injured and led to arrests.

In February, protesters threw rocks, broke windows and set fires outside the UC Berkeley's student union building, where then-Breitbart News editor and provocateur Milo Yiannopoulos was set to speak. His presentation was cancelled.