Outside the California Republican Party 'lunch banquet' in Burlingame at which Donald Trump is set to speak this afternoon, Anti-Trump protesters have swelled in numbers and turned violent. Having breached barricades, riot police have begun to move in and are arresting some of the group...

Trump protestors, supporters, clash this morning outside GOP convention in California https://t.co/NjadsnDLBj pic.twitter.com/wZCxhHpxCD — seattlepi (@seattlepi) April 29, 2016

This protest follows similar tensions at a Sothern California rally last night.

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Activists inside #GOP convention have dropped a banner reading "STOP HATE" w/ a photo of a gun wielding GOP elephant pic.twitter.com/qnv5x09tsz — Javier Panzar (@jpanzar) April 29, 2016

Nevermind, they stopped short of the 101, blocked other end of Bayshore. pic.twitter.com/Q7AzHXmzLc — Seema Mehta (@LATSeema) April 29, 2016

Topless ppl chanting "Make love, not a wall, we want equal rights for all." pic.twitter.com/CFPnliJ289 — Seema Mehta (@LATSeema) April 29, 2016