A group of protesters have forced their way into the Oxford Union and barricaded themselves inside the debating chamber.
Around 20 people are thought to have managed to get into the building in St Michael's Street and are staging a sit-in protest.
BNP leader Nick Griffin and Holocaust denier David Irving were invited to speak at the Union's Free Speech Forum.
The invitations sparked huge controversy with opinions across Oxford divided on whether the pair should be given a platform.
A thousand anti-fascist protesters roared their opposition outside the Union - including Respect MP George Galloway.
Campaigners from Unite Against Fascism, Unison and Jewish student groups gathered outside Oxford Union armed with placards and loud hailers.
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