Jeremy Corbyn has been revealed as a member of a third Facebook group onto which antisemitic content has been posted.

Earlier this month it was reported that Mr Corbyn was a member of Palestine Live and the History of Palestine Facebook groups. Antisemitic conspiracy theories and material relating to Holocaust denial were frequently posted.

This morning the Guido Fawkes news website reported that he is also a member of a third group, the Labour Party Supporter, which displays postings about the Rothschild banking family, Jews harvesting organs and theories connecting Israel with Islamic State. 

Posts in the group cover a range of issues, although a number of posts of an antisemitic nature have been uncovered.

It has also been reported that Mr Corbyn joined the group itself, rather than being added by another member. He has now left rhe group.

A spokesman for Mr Corbyn said: “There are over 16,000 members of The Labour Party Supporter group. Jeremy has never posted in the group, did not follow its content and was not an active participant."

Yesterday Mr Corbyn apologised to the community and pledged to meet communal leaders after becoming embroiled in a row over his apparent support for an antisemitic mural.

The piece, titled Freedom for Humanity, depicted a group of apparently Jewish bankers playing Monopoly, with the board resting on the backs of naked workers.

It was scrubbed from a wall near Brick Lane after the then-Tower Hamlets mayor Lutfur Rahman said “the images of the bankers perpetuate antisemitic propaganda about conspiratorial Jewish domination of financial and political institutions”.

Earlier on Sunday the Jewish Leadership Council (JLC) and the Board of Deputies encouraged “concerned members of the Jewish community” to gather in Parliament Square in Westminster, central London, at 5.30pm on Monday evening.

They then plan to hand-deliver a letter denouncing the Labour Party’s “repeated institutional failure to properly address Jewish concerns and to tackle antisemitism”.

Jeremy Corbyn’s office and the Labour Party have been contacted for comment.