The Stop the War Coalition has deleted another article from its website amid intense media scrutiny of its activities.
The organisation, which was previously chaired by Labour leader Jeremy Corbyn, has been accused of orchestrating a social media campaign against Labour MPs who backed airstrikes in Syria.
As criticism of the group has grown over the last two weeks, it has been forced to remove three controversial articles from its website.
The first post blamed Western governments for the terror attacks that killed 130 people in Paris last month.
Labour MP John Woodcock told the BBC the article was an extremely "serious" issue for the party and a sign that Corbyn should distance himself.
"Blaming the people of France or the French government or the UK government for the killing of French or UK civilians is akin at the time of the second world war to blaming the Jewish people under the deaths of the Nazis.
"It is that serious."
The second was a widely criticised article that appeared to praise the "spirit of internationalism and solidarity" of ISIS.
It's now been deleted but you can still find it online here.
The journalist who wrote the piece, Matt Carr, later apologised for writing the article and appeared to blame readers for not understanding what he meant. "I continue to believe that the overall context of the article makes it clear that I intended no such thing," he wrote, "and that nobody who is familiar with my writing could ever believe that I would make such a suggestion."
He later said his piece had been misinterpreted but suggested he had not been clear enough. "As a writer, I always strive to be clear and straightforward," Carr wrote.
On Friday, it emerged that a third piece had been taken down from the website: an article that said in its headline that it was "Time to go to war with Israel".
Outlining the idea of a "legitimacy war", the writer, Richard Falk, said it should involve "pressures exerted through the mobilisation of a movement from below, combining popular resistance with global solidarity". Falk gave the examples of the international anti-apartheid movement against South Africa.
Stop the War has come under sustained pressure in recent weeks from MPs. Several MPs have complained that they received a flood of abusive messages before and after a parliamentary vote on whether the UK should launch airstrikes on ISIS targets in Syria.
On Sunday, former shadow minister Tristram Hunt labelled the group a "disreputable" organisation and became the first of numerous MPS to call on Corbyn to pull out of speaking at a fundraising dinner organised by Stop the War. The Labour leader made clear that he would attend the event, which takes place on Friday night.
Shadow culture secretary Michael Dugher said Corbyn might be able to influence Stop the War activists to stop sending abusive messages to MPs.
He told Politics Home: "I think it might be quite useful if he went along to it because he can have a word with them as their former chairman and say to them 'stop the intimidation, stop the abuse and stop the talk of deselections and going after Labour MPs who voted in a way they didn't approve of."