The expanding work stoppage marks the first union-backed protest in solidarity with the recent wave of student-led demonstrations on dozens of US campuses against the war in Gaza.
University officials and police came under harsh criticism from California Governor Gavin Newsom and others for how they responded to the confrontation.
University leaders faced intense scrutiny on Capitol Hill for their handling of antisemitism and campus protests since October 7, addressing violence and controversial administrative responses.
Masked assailants, later described by university officials as "instigators," stormed the camp with clubs and poles, a skirmish between the two sides ensued until broken up by police.
Groups like JVP and SJP, under the banner of human rights and justice, often venture far beyond peaceful protest into realms that many find both morally and legally questionable.
Commemorating six million victims of the Holocaust on Sunday night and Monday, let us remember that the main difference between then and today is the fact that today we have an independent state.
"They had me completely surrounded,” he told CNN. “They were saying I was an Israeli agitator, I don’t even know what that is,” he added.
Many schools with encampments have also experienced counter-demonstrations by pro-Israel students, but UCLA has stood out for the intensity and persistence of pro-Israel protests.
Local television station KABC-TV estimated that 300 to 500 people were hunkered down inside the camp, while around 2,000 more had gathered outside the barricades in support
A scuffle over an attempt to take an Israeli flag from student led to violence.