Right-wing firebrand Milo Yiannopolous arrived to UC Berkeley on Sunday for a free speech forum and was greeted by dozens of counter-protesters.

The official event was cancelled yesterday by the conservative student organization. He wrote on Instagram: 'I did what I said I would do. I showed up. Sorry to the hundreds of people the police refused to let in.'

According to the Los Angeles Times, security was only letting 100 people or so in at a time and they had to go through metal detectors to enter the plaza.

Right wing commentator Milo Yiannopoulos is escorted by police officers after he spoke during a free speech rally at Berkeley

Milo took a photo showing the protesters who were being held back by police in riot gear

A pro-Trump protester holds during sign during a free speech rally at Berkeley on Saturday

Milo Yiannopoulos (C) walks with police and a security detail through Berkley's campus

A protester wears a mask of President Donald Trump shortly after Milo's speech

Yiannopolous did not apply to use an amplification device, so he spoke to the crowd sans microphone. The entire appearance lasted 20 minutes.

He also sang the National Anthem. Also on Sunday, at least 130 NFL players took a knee in response to President Donald Trump's comments about using the silent demonstration to protest police brutality.

Yiannopolous posted photos of police looking out over the plaza on rooftops. The university claimed it spent $1 million for extra security for the forum.

He was supposed to speak at an official event at the college but it was cancelled by the the Berkeley Patriot organizers on Saturday.

Yiannopolous responded to the cancellation saying: 'We are unable to hold an official UC Berkeley speaking event. So we’re going to host an unofficial one.'

A protester and a counter protester had a debate outside of the unofficial Milo Yiannopoulos rally

Demonstrators protest the appearance of right-wing provocateur Milo Yiannopoulos rally. His appearance lasted approximately 20 minutes

Milo Yiannopoulos holds protest signs while speaking at the University of California in Berkeley

Conservative demonstrator Ben Bergquam faces off with counterprotesters who came to show defiance of conservative firebrand Milo Yiannopoulos

Hundreds of conservative protesters rallied just after Milo spoke about free speech at the notoriously liberal college campus

Counter-protesters hold up sign while waiting for Milo's arrival on Berkeley's campus. Last time he was on the campus things turned violent as protesters and counter-protesters clashed

In February, violent protesters blocked the former Breitbart editor from making a speech at the university.

He lost his $250,000 book deal later that month after video was leaked that showed the alt-right poster boy appearing to defend pedophilia.

The book deal received backlash since the announcement in January, with many on social media threatening to boycott the publisher.

Yiannopoulos's lewd comments saying relationships in which 'older men help those young boys to discover who they are' seemed to have pushed the company to back out.