Violence erupted at the University of California, Los Angeles after pro-Israeli counter-demonstrators attacked a pro-Palestinian campus encampment. Bubbling tensions on the campus boiled over following the alleged breach of a “buffer zone” between the rival groups.
I’ve seen reports that they were Chabad Lubavitch. Not sure of the accuracy.
There were two attacks on different days, so it could be separate groups, but a Jewish professor who intervened said a lot of them were speaking Hebrew and one carried a Chabad flag.