The posting was later removed after it received widespread condemnation on social media. Mr Twigg told the JC he would not comment “at this stage” on Mr Moore’s conduct.
Shortly after Mr Moore’s comments were first revealed, Wes Streeting, Labour MP for Ilford North, tweeted: “How was this person ever selected?”
Ian Austin, MP for Dudley North, said: “Someone with views like this should not even be in the Labour Party, let alone be selected as a candidate and the party and the leadership need to deal with it immediately.”
Labour sources confirmed on Wednesday that the party was investigating Mr Moore over his remarks — and that he was not standing as a candidate in the Liverpool City Council election.
Meanwhile it also emerged that Labour allowed a member who was being investigated for antisemitism to be a delegate at its recent conference.
Kayla Bibby, 33, who represented the Liverpool Riverside constituency at the conference in September, posted on Facebook an image of the Statue of Liberty being smothered by an alien creature bearing the Star of David.
According to Labour, she has since been found “guilty” and will receive training about antisemitism.