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Masked anti-fascist protesters attacked a university free speech society meeting last night, allegedly throwing smoke bombs and punching security guards.

Chilling video shows a group of protesters, with balaclavas and bandannas drawn over their faces, march into the room together at King's College London on Monday night.

Violence erupted as the protesters, some waving the Antifa anti-fascist flag, clashed with students and security at a talk hosted by the KCL Libertarian Society.

Smoke bombs were hurled on campus, a window was broken and a number of security guards were injured in the violence, eyewitnesses said.

The protesters also grabbed the speakers' microphones before smashing windows and threatening the moderator.

Organisers were forced to evacuate the building and call the police.

(Image: TWITTER/@OpinionatedEuro)

The target of the protest was controversial YouTube vlogger Carl Benjamin, who goes by the name of 'Sargon of Akkad' online.

Mr Benjamin describes himself as a 'classical liberal' vlogger; he is known for 'anti-progressive' views and has been described by critics as a member of the 'alt right'.

The event, organised by the KCL Libertarian Society, also featured a talk by Ayn Rand Institute director Dr Yaron Brook.

Protesters waved the red flag of Antifa - a self-styled left wing anti-fascist group known for its militant protest tactics.

(Image: TWITTER/@OpinionatedEuro)

The KCL Libertarian Society said in a statement released to Mirror Online: "After refusing entry to ticketed members of the public for 'safety' reasons, the King's College London & KCLSU administration failed to prevent violent and masked activists storming the stage and the university at tonight's event.

"Windows have been smashed and gas bombs lit outside campus.

"A number of KCL security guards have been assaulted, and to them and their families we offer our prayers and wishes for a speedy recovery.

"The event has now been cancelled and evacuated after threats to the moderator.

"This was an act of violence, clearly intended to silence Yaron and Sargon's planned debate, via a series of jackbooted totalitarian tactics that unfortunately proved successful tonight."

However the society stated that it would not let the attack to threaten their commitment to freedom of speech.

(Image: TWITTER/@OpinionatedEuro)

A King’s College London spokesperson told Mirror Online: "Last night’s event organised by King’s College London’s Libertarian Society had to be cancelled after protesters violently forced their way into the venue.

"The police attended and we are fully co-operating with their investigation. We absolutely condemn the use of violent protest in any situation.

"Universities provide an environment for open and uncensored debate from all sides on issues of political, scientific, moral, ethical and religious significance and where people have conflicting views.

"This should be able to take place without fear of violence or intimidation."

A Metropolitan Police spokesperson said: "Police were called at 18:50hrs on Monday, 5 March to reports of a disruption at King’s College, Westminster WC2.



"A group of people are believed to have forced their way into a building and set off fire alarms and a smoke bomb."

The spokesperson said that the group had dispersed by the time police arrived and there were no reported injuries and no arrests but their enquiries continue.

Mirror Online contacted Antifa and the KCL Libertarian Society for comment.